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Pack identity -- prolog/identity/login_crypto.pl
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 password_hash(+Plain:string, -Hash:atom) is det
Hash a password
 token_uname(+Token:string, -Uname:text) is semidet
Succeeds returning the user name if the token is valid or fails if not

Undocumented predicates

The following predicates are exported, but not or incorrectly documented.

 make_login_cookie(Arg1, Arg2)