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"""Handle authentication requests"""
import bcrypt
def credentials_in_database(cursor, email: str, password: str) -> bool:
"""Check whether credentials are in the database."""
if len(email.strip()) == 0 or len(password.strip()) == 0:
return False
cursor.execute(
("SELECT "
"users.email, user_credentials.password "
"FROM users LEFT JOIN user_credentials "
"ON users.user_id = user_credentials.user_id "
"WHERE users.email = :email"),
{"email": email})
results = cursor.fetchall()
if len(results) == 0:
return False
assert len(results) == 1, "Expected one row."
row = results[0]
return (email == row[0] and
bcrypt.checkpw(password.encode("utf-8"), row[1]))
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