please give signed up user credentials

[rajkishoreandia]

POST http://localhost:3000/api/users 500 (Internal Server Error)
dispatchXhrRequest @ xhr.js:178
xhrAdapter @ xhr.js:12
dispatchRequest @ dispatchRequest.js:52
Promise.then (async)
request @ Axios.js:58
Axios.(anonymous function) @ Axios.js:78
wrap @ bind.js:9
signup @ api.js:7
(anonymous) @ users.js:4
(anonymous) @ index.js:11
(anonymous) @ bindActionCreators.js:3
SignupPage._this.submit @ SignupPage.js:8
SignupForm._this.onSubmit @ SignupForm.js:32
apply @ _apply.js:15
baseInvoke @ _baseInvoke.js:21
apply @ _apply.js:16
(anonymous) @ _overRest.js:32
handleSubmit @ Form.js:122
callCallback @ react-dom.development.js:100
invokeGuardedCallbackDev @ react-dom.development.js:138
invokeGuardedCallback @ react-dom.development.js:187
invokeGuardedCallbackAndCatchFirstError @ react-dom.development.js:201
executeDispatch @ react-dom.development.js:461
executeDispatchesInOrder @ react-dom.development.js:483
executeDispatchesAndRelease @ react-dom.development.js:581
executeDispatchesAndReleaseTopLevel @ react-dom.development.js:592
forEachAccumulated @ react-dom.development.js:562
runEventsInBatch @ react-dom.development.js:723
runExtractedEventsInBatch @ react-dom.development.js:732
handleTopLevel @ react-dom.development.js:4477
batchedUpdates$1 @ react-dom.development.js:16660
batchedUpdates @ react-dom.development.js:2131
dispatchEvent @ react-dom.development.js:4556
interactiveUpdates$1 @ react-dom.development.js:16715
interactiveUpdates @ react-dom.development.js:2150
dispatchInteractiveEvent @ react-dom.development.js:4533
SignupForm.js:54 Uncaught TypeError: Cannot read property 'email' of undefined
at SignupForm.render (SignupForm.js:54)
at finishClassComponent