'Spring Boot only OTP login NO password

In the spring boot rest application (frontend end is Angular), Looking to implement OTP-based login. without any password. Every time a user needs to log in using a mobile/email number and the OTP sends it to the mobile/email.

The first-time login, treat as registration and create a user in DB, and further same user login will fetch profile data from DB.

Similar to https://www.cowin.gov.in/ enter image description here

spring-bootauthenticationoauth-2.0registrationone-time-password


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