Added JWT bearer authentication

Startup.cs

@@ -1,5 +1,7 @@
 using System;
+using System.Text;
 
+using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Configuration;
@@ -72,6 +74,20 @@ namespace Icarus
 
             var connString = Configuration.GetConnectionString("DefaultConnection");
 
+            services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme).AddJwtBearer(options =>
+            {
+                options.RequireHttpsMetadata = false;
+                options.SaveToken = true;
+                options.TokenValidationParameters = new TokenValidationParameters()
+                {
+                    ValidateIssuer = true,
+                    ValidateAudience = true,
+                    ValidAudience = Configuration["JWT:Audience"],
+                    ValidIssuer = Configuration["JWT:Issuer"],
+                    IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(Configuration["JWT:Secret"]))
+                };
+            });
+
             services.AddDbContext<SongContext>(options => options.UseMySQL(connString));
             services.AddDbContext<AlbumContext>(options => options.UseMySQL(connString));
             services.AddDbContext<ArtistContext>(options => options.UseMySQL(connString));