Man pages matching name net::oauth2::authorizationserver::passwordgrant in section 3pm:

Net::OAuth2::AuthorizationServer::PasswordGrant.3pm.en	debian 10 / libnet-oauth2-authorizationserver-perl
Net::OAuth2::AuthorizationServer::PasswordGrant.3pm.en	debian 11 / libnet-oauth2-authorizationserver-perl
Net::OAuth2::AuthorizationServer::PasswordGrant.3pm.en	debian 12 / libnet-oauth2-authorizationserver-perl