Discriminated union returned by every sign-in / set-session / refresh method. Always check error first — data fields are null on failure. A precise variant of AuthResult; the same never-throw contract applies.
error
data
null
Discriminated union returned by every sign-in / set-session / refresh method. Always check
errorfirst —datafields arenullon failure. A precise variant of AuthResult; the same never-throw contract applies.