added refresh tocken

docs/swagger.yaml

@@ -1,6 +1,9 @@
 definitions:
   internal_auth.AuthResponse:
     properties:
+      refresh_token:
+        example: dGhpcyBpcyBhIHJlZnJlc2ggdG9rZW4=
+        type: string
       token:
         example: eyJhbGciOiJIUzI1NiIs...
         type: string
@@ -25,6 +28,14 @@ definitions:
     - email
     - password
     type: object
+  internal_auth.RefreshRequest:
+    properties:
+      refresh_token:
+        example: dGhpcyBpcyBhIHJlZnJlc2ggdG9rZW4=
+        type: string
+    required:
+    - refresh_token
+    type: object
   internal_auth.RegisterRequest:
     properties:
       email:
@@ -117,6 +128,36 @@ paths:
       summary: Epta get current user
       tags:
       - auth
+  /api/auth/refresh:
+    post:
+      consumes:
+      - application/json
+      description: Get a new access token using a refresh token
+      parameters:
+      - description: Refresh token
+        in: body
+        name: request
+        required: true
+        schema:
+          $ref: '#/definitions/internal_auth.RefreshRequest'
+      produces:
+      - application/json
+      responses:
+        "200":
+          description: OK
+          schema:
+            $ref: '#/definitions/internal_auth.AuthResponse'
+        "400":
+          description: Bad Request
+          schema:
+            $ref: '#/definitions/internal_auth.ErrorResponse'
+        "401":
+          description: Unauthorized
+          schema:
+            $ref: '#/definitions/internal_auth.ErrorResponse'
+      summary: Refresh epta token
+      tags:
+      - auth
   /api/auth/register:
     post:
       consumes: