feat(api): Add check token endpoint

backend/main.py

@@ -141,3 +141,8 @@ def verify_supporter(form_data: OAuth2PasswordRequestForm = Depends()):
         ),
         "token_type": "bearer",
     }
+
+
+@app.get("/token/check")
+def check_token_validity(token: str = Depends(oauth2_scheme)):
+    check_token(token)