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from typing import Optional, Tuple, Union
class CredentialProvider:
"""
Credentials Provider.
"""
def get_credentials(self) -> Union[Tuple[str], Tuple[str, str]]:
raise NotImplementedError("get_credentials must be implemented")
class UsernamePasswordCredentialProvider(CredentialProvider):
"""
Simple implementation of CredentialProvider that just wraps static
username and password.
"""
def __init__(self, username: Optional[str] = None, password: Optional[str] = None):
self.username = username or ""
self.password = password or ""
def get_credentials(self):
if self.username:
return self.username, self.password
return (self.password,)
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