diff --git a/Authentication.md b/Authentication.md
index 4a284cd..c384aa8 100644
--- a/Authentication.md
+++ b/Authentication.md
@@ -1 +1,46 @@
-### Authentication
\ No newline at end of file
+## Authentication  
+### Retrieving token
+**URI**: https://icarus-demo.com/api/v1/login  
+**Method**: Post  
+**Content type**: application/json  
+**Request body**:  
+```Json
+{
+    "username" : "phoenix",
+    "password" : "Flame"
+}
+```
+**Response body**:
+```Json
+{
+    "id" : 1,
+    "username" : "phoenix",
+    "token" : "dsfsdfnisdnosnfwefh923hr329hf29fb293fhn20jf20f",
+    "token_type" : "Bearer",
+    "expiration" : 8000
+}
+```  
+### Register
+**URI**: https://icarus-demo.com/api/v1/register  
+**Method**: Post  
+**Content type**: application/json  
+**Request body**:  
+```Json
+{
+    "first_name" : "Atman",
+    "last_name" : "Heron",
+    "username" : "ateron",
+    "nickname" : "heron",
+    "password" : "secret",
+    "email" : "elysium@aaru.org",
+    "phone_number" : "(789) 555-841"
+}
+```
+**Response body**:
+```Json
+{
+    "username" : "ateron",
+    "successfully_registered" : true,
+    "message" : "User successfully registered"
+}
+```  
\ No newline at end of file