Greetings Soumya! Welcome to Microsoft Q&A!
Apologies for the delay! I'm able to access the site fine now.
//To share little bit of background of what may have triggered this or tackle such issues in future – Kindly review the ‘Authentication / Authorization’ settings of your WebApp for any authentication configuration that may been applied. Users may have been presented with one or more /.auth/login/<provider> links to sign into the app or any role-specific authorization.
Kindly checkout the documentation for more details on this topic.