add logoff method

backend.yml

@@ -46,6 +46,22 @@ paths:
               schema:
                 $ref: '#/components/schemas/ApiResponse'
 
+  /api/auth/logoff:
+    post:
+      tags:
+      - backend
+      summary: Logs out a user
+      operationId: logoff
+      responses:
+        200:
+          description: successful operation
+        401:
+          description: Incorrect credentials
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ApiResponse'
+
   /api/auth/me:
     get:
       tags: