docs(api): precised return code info

API.md

@@ -24,11 +24,11 @@ This verification link will time out after 10 minutes.
 #### Responses
 ##### 200 - Success
 The verification request was sent.
-##### 400 - Error
+##### 400 - Error: Bad Request
 The request was malformed.
-##### 403 - Error
+##### 403 - Error: Forbidden
 The password is not matching the requirements.
-##### 409 - Error
+##### 409 - Error: Conflict
 The requested username or email is already taken.
 
 __Content - JSON:__
@@ -36,7 +36,7 @@ __Content - JSON:__
 |----------|----------------------------------------------------------------------|
 | conflict | Can be `username` or `email`, depending on what caused the conflict. |
 
-##### 422 - Error
+##### 422 - Error: Unprocessable Entity
 Malformed email address.
 
 ### `/account/verify` - POST
@@ -55,9 +55,9 @@ Verifies a requested account.
 #### Responses
 ##### 200 - Success
 The account was verified. You can login now.
-##### 400 - Error
+##### 400 - Error: Bad Request
 The request was malformed.
-##### 403 - Error
+##### 403 - Error: Forbidden
 The provided token is unknown.
 
 ### `/account/authenticate` - POST
@@ -83,11 +83,11 @@ __Content - JSON:__
 |-------|------------------------|
 | token | A unique access token. |
 
-##### 400 - Error
+##### 400 - Error: Bad Request
 The request was malformed.
-##### 403 - Error
+##### 403 - Error: Forbidden
 The provided password was wrong.
-##### 404 - Error
+##### 404 - Error: Not Found
 The provided username was not found.
 
 ### `/account/delete` - DELETE
@@ -101,5 +101,5 @@ Deletes the account.
 #### Responses
 ##### 200 - Success
 The account was deleted.
-##### 403 - Errorpassword was wrong
+##### 403 - Error: Forbidden
 The provided token doesn't allow you to perform this operation.