Unnecessary isEmpty method

[meroo36]

extension AuthStringExtension on String {
  bool get isNotBlank => isNotEmpty && !contains(' ');

the second condition, "contains", make it impossible to create a custom button with empty characters. It will fall into assert.

I would suggest that we can remove it and "isNotEmpty" is enough for it.

[elbeicktalat]

Hi there,

In fact I want allow adding button without a text, if you're thinking to have only Icon style then just reduce the size or set the button type to be icon.

buttonType: AuthButtonType.icon

[fryette]

With that check impossible to set a text with spaces for CustomAuthButton, this check is incorrect anyway.

For example: 'Sign In with Login and Password', so this is not empty and contains spaces, the check will fail

          (style.buttonType != AuthButtonType.icon)
              ? text != null && text.isNotBlank
              : text == null,
          (style.buttonType != AuthButtonType.icon)
              ? 'Text must be not blank.'
              : 'Icon button type does not need a text.',
        );