feat: add profile information (#621)

* add username validator

* add login for username and email in one field

* add social links and biography to user profile

* return users details able to get users by username

* fix failing tests

Author: Mubangizi

api_docs.yml

@@ -17,13 +17,16 @@ paths:
             required:
               - email
               - name
+              - username
               - password
               - organisation
             properties:
               email:
                 type: string
               name:
                 type: string
+              username:
+                type: string
               password:
                 type: string
               organisation:
@@ -188,6 +191,7 @@ paths:
           description: "Bearer [token]"
         - in: path
           name: user_id
+          description: "User ID or username"
           required: true
           type: string
 
@@ -229,6 +233,14 @@ paths:
                 type: boolean
               organisation:
                 type: string
+              biography:
+                type: string
+              social_links:
+                type: object
+              profile_picture:
+                type: string
+              username:
+                type: string
       responses:
         200:
           description: "Success"