Hospital/Patient login error popup message is undefined

[vmittal05]

Describe the bug

Upon entering wrong credentials in the Hospital Login or Patient login page, the window alert box and popup on the screen has error message: undefined and ${this.err} instead of a proper descriptive error message.

Expected behavior

I will update the UI to display a meaningful error message.

Screenshots

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[vmittal05]

Hi @pranjay-poddar, please assign this issue to me under Hacktoberfest.