Adding role to users

A user is defined by it's role and should be defined in it's setter and
getter

Closes #8

Documents/proto/general/openapi.yaml

@@ -35,8 +35,7 @@ paths:
           name: type
           required: false 
           schema:
-            type: string
-            enum: [teacher, student, secretary]
+            $ref: '#components/schemas/Roles'
       responses: 
         '200':
           description: OK
@@ -89,6 +88,8 @@ paths:
                 BirthDate:
                   type: string
                   description: Follow the iso 8601 ("YYYY-MM-DD")
+                Role:
+                  $ref: "#/components/schemas/Roles"
               example:
                 {
                 "LastName": "Doe" ,
@@ -98,6 +99,7 @@ paths:
                   "Address": "Rue de Tournais 42",
                   "Country": "BE"},
                 "BirthDate": "1941-02-22",
+                "Role": "student"
                 }
       responses:
         '201':
@@ -122,6 +124,7 @@ paths:
           description: Successfully changed. 
         '401':
           $ref: '#/components/responses/UnauthorizedError'
+
   /user/{mat}:
     parameters:
       - name: mat
@@ -390,6 +393,8 @@ components:
         birthDate:
           type: string
           description: Follow the iso 8601 ("YYYY-MM-DD")
+        role:
+          $ref: '#/components/schemas/Roles'
       example:
         {
         "regNo": 42,
@@ -400,7 +405,7 @@ components:
           "address": "Rue de Tournais 42",
           "country": "BE"},
         "birthDate": "1941-02-22",
-        "staffMember": true,
+        "role": "student"
         }
     Address:
       type: object
@@ -459,6 +464,10 @@ components:
         "id": 42,
         "courses": ['Math', 'Info']
         }
+    Roles:
+      type: string
+      enum: [teacher, student, secretary]
+
   responses:
     UnauthorizedError:
       description: Unauthorized access or missing bearer