Missing folder react-native-userdefaults-ios/Pods/

[never00miss]

What i am using : {
"react": "16.6.1",
"react-native": "0.57.7",
}

i was doing what tutorial said, step by step, what should i do now.

error what i got
node_modules/react-native-userdefaults-ios/Pods/Target Support Files/Pods-RNUserDefaultsIOSTests/Pods-RNUserDefaultsIOSTests.debug.xcconfig: unable to open file (in target "RNUserDefaultsIOSTests" in project "RNUserDefaultsIOS") (in target 'RNUserDefaultsIOSTests')

and
node_modules/react-native-userdefaults-ios/Pods/Target Support Files/Pods-RNUserDefaultsIOSTests/Pods-RNUserDefaultsIOSTests.debug.xcconfig: unable to open file (in target "RNUserDefaultsIOSTests" in project "RNUserDefaultsIOS") (in target 'RNUserDefaultsIOSTests')

and
node_modules/react-native-userdefaults-ios/Pods/Target Support Files/Pods-RNUserDefaultsIOSTests/Pods-RNUserDefaultsIOSTests.debug.xcconfig: unable to open file (in target "RNUserDefaultsIOSTests" in project "RNUserDefaultsIOS") (in target 'RNUserDefaultsIOSTests')

and
node_modules/react-native-userdefaults-ios/Pods/Target Support Files/Pods-RNUserDefaultsIOSTests/Pods-RNUserDefaultsIOSTests.debug.xcconfig: unable to open file (in target "RNUserDefaultsIOSTests" in project "RNUserDefaultsIOS") (in target 'RNUserDefaultsIOSTests')