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LucianU/syntaxError.hs

Last active October 26, 2018 13:08
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syntaxError.hs
userLogin :: EitherIO LoginError Text
userLogin = do
token <- getToken
userpw <- maybe (liftEither (Left NoSuchUser))
return (Map.lookup token users)
password <- liftIO (
T.putStrLn "Enter your password:" >>
T.getLine
)
if userpw == password then
return token
else
liftEither (Left WrongPassword)
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