Error handling from server in all networking files

APIkit.js

components/CustomDialog.js

components/PendingUser.js

constants/toasts.js

redux/actions/UserActions.js

screens/SignUpScreen.js

screens/VerifyPasswordScreen.js

screens/admin/ChangeSalamanderScreen.js

screens/admin/ManageSalamandersScreen.js

screens/admin/ManageUsersScreen.js

screens/admin/PendingUsersScreen.js

screens/admin/SalamanderOverviewScreen.js

screens/camera/CameraScreen.js

screens/camera/RegisterSalamanderScreen.js

screens/home/EditLocationScreen.js

screens/home/RegisterLocationScreen.js

screens/profile/ChangeEmailScreen.js

screens/profile/ChangeNameScreen.js

screens/profile/ChangePasswordScreen.js

screens/profile/DeleteAccountScreen.js