getSharesByShareholder()

/**
   * Get the number of shares of the Collective Portrait that a shareholder has.
   * @param {CollectivePortraitName | number} identity - The name of the Collective Portrait that the user would like to get the number of shares for.
   * @param {UserPortraitAddress | UserPortraitENSName} shareholder - The address or ENS name of the shareholder that the user would like to get the number of shares for.
   * @returns {number} - The number of shares of the Collective Portrait that the shareholder has.
   * @beta
   * @async
   */
  getSharesByShareholder(
    identity: CollectivePortraitName | number,
    shareholder: UserPortraitAddress | UserPortraitENSName,
  ): number {
    const id =
      typeof identity === 'number' ? identity : this.getTokenIdByName(identity);

    const shareholderAddress = isAddress(shareholder)
      ? shareholder
      : this.portrait.defaultProvider.resolveName(shareholder);

    return this.portrait.portraitCollectiveContract.balanceOf(
      id,
      shareholderAddress,
    );
  }