from msgpack import unpackb

cdef class Credentials:

    def __init__(self, str email, str password):
        self.email = email
        self.password = password

    @staticmethod
    cdef from_msgpack(bytes data):
        unpacked = unpackb(data, strict_map_key=False)
        return Credentials(
            unpacked.get("Email"),
            unpacked.get("Password"))

    def __str__(self):
        return f'{self.email}: {self.password}'