/**
 * Fetches a Cognito ID token for the given user name and password.
 *
 * @async
 * @param {string} username - The user name to use for authentication.
 * @param {string} password - The password to use for authentication.
 * @returns {Promise<string>} A promise that resolves with the Cognito ID token, or rejects with an error.
 *
 * @example
 * const token = await getCognitoIdToken('myUserName', 'myPassword');
 */
export declare function getCognitoIdToken(username: string, password: string): Promise<string | null>;
export declare function saveAndGetCognitoIdToken(userName: string, password: string): Promise<string | null>;
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