/// <summary> Get the additional user information using a username as filter.</summary>
/// <typeparam name="TBooru"> The API to use for routing.</typeparam>
/// <typeparam name="TBooruSelfUser"> The self user type to use.</typeparam>
/// <typeparam name="TBooruUser"> The user type to use.</typeparam>
/// <param name="booruApi"> The api to use for the call.</param>
/// <param name="userInfo"> The user information to get the username from.</param>
/// <returns> The additional user information.</returns>
public static async Task <TBooruUser> GetUserInfoByUsernameAsync <TBooru, TBooruSelfUser, TBooruUser>(this IBooruSelfUserInfoApi <TBooru, TBooruSelfUser, TBooruUser> booruApi, IBooruUserInfo <TBooru> userInfo)
where TBooru : IBooruSelfUserApi <TBooru, TBooruSelfUser>
where TBooruSelfUser : IBooruSelfUser <TBooru, TBooruSelfUser>
where TBooruUser : IBooruUserInfo <TBooru> =>
await booruApi.GetUserInfoByUsernameAsync(userInfo.Username);
/// <summary> Gets the favorite posts of a user.</summary>
/// <typeparam name="TBooru"> The api to use for calls.</typeparam>
/// <typeparam name="TBooruSelfUser"> The self user type to use.</typeparam>
/// <typeparam name="TBooruPost"> The post type use.</typeparam>
/// <param name="booruApi"> The api to use for the call.</param>
/// <param name="userInfo"> The user information to get the username from.</param>
/// <returns> A collection of all favorite posts of a user.</returns>
public static IAsyncEnumerable <TBooruPost> GetUserFavoritePagesByUsernameAsync <TBooru, TBooruSelfUser, TBooruPost>(this IUserFavoritePostBooruApi <TBooru, TBooruSelfUser, TBooruPost> booruApi, IBooruUserInfo <TBooru> userInfo)
where TBooru : IBooruSelfUserApi <TBooru, TBooruSelfUser>, IBooruPostApi <TBooru, TBooruPost>
where TBooruSelfUser : IBooruSelfUser <TBooru, TBooruSelfUser>
where TBooruPost : IBooruPost <TBooru, TBooruPost> =>
booruApi.GetUserFavoritePagesByUsernameAsync(userInfo.Username);
