Did some work. Though it was a good idea to commit before something goes wrong.

Mear/Mear.Android/MainActivity.cs

@@ -24,6 +24,7 @@ namespace Mear.Droid
             Xamarin.Essentials.Platform.Init(this, savedInstanceState);
             global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
             LoadApplication(new App());
+
         }
         public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
         {

Mear/Mear.Android/Mear.Android.csproj

@@ -55,6 +55,15 @@
     <PackageReference Include="Plugin.MediaManager">
       <Version>0.6.1</Version>
     </PackageReference>
+    <PackageReference Include="Plugin.MediaManager.Forms">
+      <Version>0.6.1</Version>
+    </PackageReference>
+    <PackageReference Include="RestSharp">
+      <Version>106.6.9</Version>
+    </PackageReference>
+    <PackageReference Include="sqlite-net-pcl">
+      <Version>1.5.231</Version>
+    </PackageReference>
     <PackageReference Include="Xamarin.Forms" Version="4.0.0.425677" />
     <PackageReference Include="Xamarin.Android.Support.Design" Version="28.0.0.1" />
     <PackageReference Include="Xamarin.Android.Support.v7.AppCompat" Version="28.0.0.1" />

Mear/Mear.iOS/Mear.iOS.csproj

@@ -124,8 +124,17 @@
     <Reference Include="System.Numerics.Vectors" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Xamarin.Forms" Version="3.6.0.264807" />
-    <PackageReference Include="Xamarin.Essentials" Version="1.0.1" />
+    <PackageReference Include="Plugin.MediaManager.Forms">
+      <Version>0.6.1</Version>
+    </PackageReference>
+    <PackageReference Include="RestSharp">
+      <Version>106.6.9</Version>
+    </PackageReference>
+    <PackageReference Include="sqlite-net-pcl">
+      <Version>1.5.231</Version>
+    </PackageReference>
+    <PackageReference Include="Xamarin.Forms" Version="4.0.0.425677" />
+    <PackageReference Include="Xamarin.Essentials" Version="1.1.0" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\iOS\Xamarin.iOS.CSharp.targets" />
   <ItemGroup>

Mear/Mear/App.xaml.cs

@@ -12,7 +12,7 @@ namespace Mear
         {
             InitializeComponent();
 
-			MainPage = new MusicLibrary();
+			MainPage = new Landing();
         }
 
         protected override void OnStart()

Mear/Mear/Constants/API/API.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Mear.Constants.API
+{
+	public class API
+	{
+		#region Fields
+		private static string _apiUrl = @"https://www..com/";
+		private string _apiVersion;
+		#endregion
+
+
+		#region Properties
+		public static string ApiUrl
+		{
+			get => _apiUrl;
+		}
+		#endregion
+
+
+		#region Constructors
+		#endregion
+
+
+		#region Methods
+		#endregion
+	}
+}

Mear/Mear/Managers/LoginManager.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using Newtonsoft.Json;
+using RestSharp;
+
+using Mear.Constants.API;
+using Mear.Models.Authentication;
+
+namespace Mear.Managers
+{
+	public class LoginManager
+	{
+		#region Fields
+		private User _user;
+		#endregion
+
+
+		#region Properties
+		#endregion
+
+
+		#region Constructors
+		public LoginManager(User user)
+		{
+			_user = user;
+		}
+		#endregion
+
+
+		#region Methods
+		public LoginResult Login()
+		{
+			try
+			{
+				var client = new RestClient(API.ApiUrl);
+				var request = new RestRequest(@"api/login", Method.POST);
+				var userJson = JsonConvert.SerializeObject(_user);
+
+				request.AddParameter("application/json; charset=utf-8", userJson, ParameterType.RequestBody);
+				request.RequestFormat = DataFormat.Json;
+
+				var response = client.Execute(request);
+
+				var loginResult = JsonConvert.DeserializeObject<LoginResult>(response.Content);
+
+				return loginResult;
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+			}
+
+			return null;
+		}
+		#endregion
+	}
+}

Mear/Mear/Managers/RegisterManager.cs

@@ -0,0 +1,59 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using Newtonsoft.Json;
+using RestSharp;
+
+using Mear.Constants.API;
+using Mear.Models;
+using Mear.Models.Authentication;
+
+namespace Mear.Managers
+{
+	public class RegisterManager
+	{
+		#region Fields
+		private User _user;
+		#endregion
+
+
+		#region Properties
+		#endregion
+
+
+		#region Constructors
+		public RegisterManager(User user)
+		{
+			_user = user;
+		}
+		#endregion
+
+
+		#region Methods
+		public RegisterResult RegisterUser()
+		{
+			try
+			{
+				var client = new RestClient(API.ApiUrl);
+				var request = new RestRequest(@"api/register", Method.POST);
+				var userJson = JsonConvert.SerializeObject(_user);
+				request.AddParameter("application/json; charset=utf-8", userJson, ParameterType.RequestBody);
+				request.RequestFormat = DataFormat.Json;
+
+				var response = client.Execute(request);
+
+				var registerResult = JsonConvert.DeserializeObject<RegisterResult>(response.Content);
+
+				return registerResult;
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+			}
+
+			return null;
+		}
+		#endregion
+	}
+}

Mear/Mear/Mear.csproj

@@ -13,6 +13,9 @@
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
     <PackageReference Include="Plugin.MediaManager" Version="0.6.1" />
+    <PackageReference Include="Plugin.MediaManager.Forms" Version="0.6.1" />
+    <PackageReference Include="RestSharp" Version="106.6.9" />
+    <PackageReference Include="sqlite-net-pcl" Version="1.5.231" />
     <PackageReference Include="Xamarin.Forms" Version="4.0.0.425677" />
     <PackageReference Include="Xamarin.Essentials" Version="1.1.0" />
   </ItemGroup>
@@ -34,9 +37,18 @@
     <EmbeddedResource Update="Views\ArtistView.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
+    <EmbeddedResource Update="Views\Landing.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
+    <EmbeddedResource Update="Views\LoginPage.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
     <EmbeddedResource Update="Views\MusicLibrary.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
+    <EmbeddedResource Update="Views\RegisterPage.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
     <EmbeddedResource Update="Views\SongView.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>

Mear/Mear/Models/Authentication/BaseResult.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using Newtonsoft.Json;
+
+namespace Mear.Models.Authentication
+{
+	public class BaseResult
+	{
+		[JsonProperty("message")]
+		public string Message { get; set; }
+	}
+}

Mear/Mear/Models/Authentication/LoginResult.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using Newtonsoft.Json;
+
+namespace Mear.Models.Authentication
+{
+	public class LoginResult : BaseResult
+	{
+		[JsonProperty("id")]
+		public int UserId { get; set; }
+		[JsonProperty("username")]
+		public string Username { get; set; }
+		[JsonProperty("token")]
+		public string Token { get; set; }
+		[JsonProperty("token_type")]
+		public string TokenType { get; set; }
+		[JsonProperty("expiration")]
+		public int Expiration { get; set; }
+	}
+}

Mear/Mear/Models/Authentication/RegisterResult.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using Newtonsoft.Json;
+
+namespace Mear.Models.Authentication
+{
+	public class RegisterResult : BaseResult
+	{
+		[JsonProperty("username")]
+		public string Username { get; set; }
+		[JsonProperty("successfully_registered")]
+		public bool SuccessfullyRegistered { get; set; }
+	}
+}

Mear/Mear/Models/Authentication/User.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using Newtonsoft.Json;
+
+namespace Mear.Models.Authentication
+{
+	public class User
+	{
+		[JsonProperty("id")]
+		public int Id { get; set; }
+		[JsonProperty("username")]
+		public string Username { get; set; }
+		[JsonProperty("nickname")]
+		public string Nickname { get; set; }
+		[JsonProperty("password")]
+		public string Password { get; set; }
+		[JsonProperty("email")]
+		public string Email { get; set; }
+		[JsonProperty("phone_number")]
+		public string PhoneNumber { get; set; }
+		[JsonProperty("first_name")]
+		public string Firstname { get; set; }
+		[JsonProperty("last_name")]
+		public string Lastname { get; set; }
+		[JsonProperty("email_verified")]
+		public bool EmailVerified { get; set; }
+		[JsonProperty("date_created")]
+		public DateTime DateCreated { get; set; }
+		[JsonProperty("last_login")]
+		public DateTime? LastLogin { get; set; }
+	}
+}

Mear/Mear/Repositories/Database/DBTokenRepository.cs

@@ -0,0 +1,10 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Mear.Repositories.Database
+{
+	public class DBTokenRepository
+	{
+	}
+}

Mear/Mear/Repositories/Mock/MockUserRepository.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+using Mear.Models.Authentication;
+
+namespace Mear.Repositories.Mock
+{
+	public class MockUserRepository
+	{
+		#region Fields
+		private List<User> _users;
+		#endregion
+
+
+		#region Methods
+		public List<User> Users
+		{
+			get => _users;
+		}
+		#endregion
+
+
+		#region Constructors
+		public MockUserRepository()
+		{
+			InitializeMockUser();
+		}
+		#endregion
+
+
+		#region Methods
+		private void InitializeMockUser()
+		{
+			_users = new List<User>();
+
+			var firstname = "";
+			var lastname = "";
+			var email = "";
+			var phone = "";
+			var username = "";
+			var password = "";
+
+			_users.Add(new User
+			{
+				Firstname = firstname,
+				Lastname = lastname,
+				Email = email,
+				PhoneNumber = phone,
+				Username = username,
+				Password = password
+			});
+		}
+		#endregion
+	}
+}

Mear/Mear/Views/Landing.xaml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="Mear.Views.Landing">
+    <ContentPage.Content>
+        <StackLayout>
+            <Label Text="Mear powered by Icarus"
+                VerticalOptions="CenterAndExpand" 
+                HorizontalOptions="CenterAndExpand" />
+
+			<Button x:Name="Login"
+					Text="Login"
+					Clicked="Login_Clicked" />
+			<Button x:Name="Register"
+					Text="Register"
+					Clicked="Register_Clicked" />
+		</StackLayout>
+    </ContentPage.Content>
+</ContentPage>

Mear/Mear/Views/Landing.xaml.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+namespace Mear.Views
+{
+	[XamlCompilation(XamlCompilationOptions.Compile)]
+	public partial class Landing : ContentPage
+	{
+		public Landing()
+		{
+			InitializeComponent();
+		}
+
+		private void Login_Clicked(object sender, EventArgs e)
+		{
+			Navigation.PushModalAsync(new LoginPage());
+		}
+
+		private void Register_Clicked(object sender, EventArgs e)
+		{
+			Navigation.PushModalAsync(new RegisterPage());
+		}
+	}
+}

Mear/Mear/Views/LoginPage.xaml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="Mear.Views.LoginPage">
+    <ContentPage.Content>
+        <StackLayout>
+            <Label Text="Login into Icarus account"
+                VerticalOptions="CenterAndExpand" 
+                HorizontalOptions="CenterAndExpand" />
+
+			<Label Text="Username" />
+			<Entry x:Name="Username"
+				   Placeholder="Username" />
+
+			<Label Text="Password" />
+			<Entry x:Name="Password"
+				   IsPassword="True"
+				   Placeholder="Password" />
+
+			<Button x:Name="AuthenticateUser"
+					Text="Login"
+					Clicked="AuthenticateUser_Clicked" />
+		</StackLayout>
+    </ContentPage.Content>
+</ContentPage>

Mear/Mear/Views/LoginPage.xaml.cs

@@ -0,0 +1,95 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+using Mear.Managers;
+using Mear.Models.Authentication;
+using Mear.Repositories.Mock;
+
+namespace Mear.Views
+{
+	[XamlCompilation(XamlCompilationOptions.Compile)]
+	public partial class LoginPage : ContentPage
+	{
+		#region Fields
+		#endregion
+
+
+		#region Properties
+		#endregion
+
+
+		#region Constructors
+		public LoginPage()
+		{
+			InitializeComponent();
+			DummyUser();
+		}
+		#endregion
+
+		#region Methods
+		private User ExtractCredentials()
+		{
+			try
+			{
+				var username = Username.Text;
+				var password = Password.Text;
+
+				return new User
+				{
+					Username = username,
+					Password = password
+				};
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+			}
+			return null;
+		}
+
+		#region Events
+		private async void AuthenticateUser_Clicked(object sender, EventArgs e)
+		{
+			AuthenticateUser.IsEnabled = false;
+
+			var user = ExtractCredentials();
+
+			if (user != null)
+			{
+				var loginMgr = new LoginManager(user);
+				var loginRes = loginMgr.Login();
+
+				if (loginRes.Expiration > 0 && loginRes != null)
+				{
+					await DisplayAlert("Icarus Login", "Successfully logged in", "Ok");
+					App.Current.MainPage = new MusicLibrary();
+				}
+				else
+				{
+					await DisplayAlert("Icarus Login", "Unable to login", "Ok");
+				}
+			}
+
+			AuthenticateUser.IsEnabled = true;
+		}
+		#endregion
+
+		#region Test
+		private void DummyUser()
+		{
+			var mockUserRepo = new MockUserRepository();
+			var mockUser = mockUserRepo.Users[0];
+
+			Username.Text = mockUser.Username;
+			Password.Text = mockUser.Password;
+		}
+		#endregion
+		#endregion
+	}
+}

Mear/Mear/Views/MusicLibrary.xaml

@@ -8,14 +8,12 @@
              x:Class="Mear.Views.MusicLibrary">
 		
   <!--Pages can be added as references or inline-->
-  <!--
   <ContentPage Title="Songs" />
   <ContentPage Title="Albums" />
   <ContentPage Title="Artists" />
-  -->
 
-	<TabbedPage.Children>
 	<!--
+	<TabbedPage.Children>
 		<NavigationPage Title="Songs">
 			<NavigationPage.Icon>
 				<OnPlatform x:TypeArguments="FileImageSource">
@@ -26,7 +24,6 @@
 				<views:SongView />
 			</x:Arguments>
 		</NavigationPage>
-		-->
 
 		<NavigationPage Title="Albums">
 			<NavigationPage.Icon>
@@ -36,7 +33,6 @@
 			</NavigationPage.Icon>
 		</NavigationPage>
 
-		<!--
 		<NavigationPage Title="Artists">
 			<NavigationPage.Icon>
 				<OnPlatform x:TypeArguments="FileImageSource">
@@ -47,7 +43,7 @@
 				<views:ArtistView />
 			</x:Arguments>
 		</NavigationPage>
-		-->
 	</TabbedPage.Children>
+	-->
 
 </TabbedPage>

Mear/Mear/Views/RegisterPage.xaml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="Mear.Views.RegisterPage">
+    <ContentPage.Content>
+        <StackLayout>
+            <Label Text="Create Icarus account"
+                VerticalOptions="CenterAndExpand" 
+                HorizontalOptions="CenterAndExpand" />
+
+			<Label Text="Firstname" />
+			<Entry x:Name="Firstname"
+				   Placeholder="Firstname" />
+			<Label Text="Lastname" />
+			<Entry x:Name="Lastname"
+				   Placeholder="Lastname" />
+			<Label Text="Email" />
+			<Entry x:Name="Email"
+				   Keyboard="Email"
+				   Placeholder="Email Address" />
+			<Label Text="Phone Number" />
+			<Entry x:Name="Phone"
+				   Keyboard="Telephone"
+				   Placeholder="Phone Number" />
+			<Label Text="Username" />
+			<Entry x:Name="Username"
+				   Placeholder="Username" />
+			<Label Text="Password" />
+			<Entry x:Name="Password"
+				   IsPassword="True"
+				   Placeholder="Password" />
+			<Label Text="Password (Confirm)" />
+			<Entry x:Name="PasswordConfirm"
+				   IsPassword="True"
+				   Placeholder="Password (Confirm)" />
+
+			<Button x:Name="RegisterUser"
+					Text="Create Icarus account"
+					Clicked="RegisterUser_Clicked" />
+		</StackLayout>
+    </ContentPage.Content>
+</ContentPage>

Mear/Mear/Views/RegisterPage.xaml.cs

@@ -0,0 +1,119 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+using Mear.Models;
+using Mear.Managers;
+using Mear.Models.Authentication;
+using Mear.Repositories.Mock;
+
+namespace Mear.Views
+{
+	[XamlCompilation(XamlCompilationOptions.Compile)]
+	public partial class RegisterPage : ContentPage
+	{
+		#region Fields
+		#endregion
+
+
+		#region Properties
+		#endregion
+
+
+		#region Constructors
+		public RegisterPage()
+		{
+			InitializeComponent();
+			DummyUser();
+		}
+		#endregion
+
+
+		#region Methods
+		private User ExtractCredentials()
+		{
+			try
+			{
+				var firstname = Firstname.Text.ToString();
+				var lastname = Lastname.Text.ToString();
+				var emailAddress = Email.Text.ToString();
+				var phoneNumber = Phone.Text.ToString();
+				var username = Username.Text.ToString();
+				var password = Password.Text.ToString();
+				var passwordConfirm = PasswordConfirm.Text.ToString();
+
+				if (!password.Equals(passwordConfirm))
+				{
+					return null;
+				}
+
+				return new User
+				{
+					Firstname = firstname,
+					Lastname = lastname,
+					Email = emailAddress,
+					PhoneNumber = phoneNumber,
+					Username = username,
+					Password = password
+				};
+			}
+			catch (Exception ex)
+			{
+				var msg = ex.Message;
+			}
+
+			return null;
+		}
+
+		#region Events
+		private async void RegisterUser_Clicked(object sender, EventArgs e)
+		{
+			RegisterUser.IsEnabled = false;
+
+			var user = ExtractCredentials();
+
+			if (user != null)
+			{
+				var regMgr = new RegisterManager(user);
+				var regRes = regMgr.RegisterUser();
+
+				if (regRes.SuccessfullyRegistered)
+				{
+					// TODO: Implement functionality when registration succeeds
+					await DisplayAlert("Icarus Account Creation", "Successfully created Icarus user", "Ok");
+					await Navigation.PopModalAsync(true);
+				}
+				else
+				{
+					await DisplayAlert("Icarus Account Creation", "Icarus user was not created", "Ok");
+					// TODO: Implement functionality when registration fails
+				}
+			}
+
+			RegisterUser.IsEnabled = true;
+		}
+		#endregion
+
+		#region Test
+		private void DummyUser()
+		{
+			var mockUserRepo = new MockUserRepository();
+			var mockUser = mockUserRepo.Users[0];
+
+			Firstname.Text = mockUser.Firstname;
+			Lastname.Text = mockUser.Lastname;
+			Email.Text = mockUser.Email;
+			Phone.Text = mockUser.PhoneNumber;
+			Username.Text = mockUser.Username;
+			Password.Text = mockUser.Password;
+			PasswordConfirm.Text = mockUser.Password;
+		}
+		#endregion
+		#endregion
+	}
+}