errors
errors: object
auth/invalid-email
auth/invalid-email: string = "Invalid email."
auth/invalid-input
auth/invalid-input: string = "Invalid input."
auth/invalid-password
auth/invalid-password: string = "Invalid password."
auth/invalid-token
auth/invalid-token: string = "Invalid token."
auth/user-exists
auth/user-exists: string = "User already exists."
auth/user-not-exists
auth/user-not-exists: string = "No user."
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