feat(GuildMemberManager): add 'search' method

src/managers/GuildMemberManager.js

@@ -136,6 +136,19 @@ class GuildMemberManager extends BaseManager {
     return this._fetchMany(options);
   }
 
+  /**
+   * Search for members in the guild based on a query.
+   * @param {Object} options Search options
+   * @property {string} options.query Filter members whose username or nickname start with this query
+   * @property {number} [options.limit=1] Maximum number of members to search
+   * @property {boolean} [options.cache=true] Whether or not to cache the fetched member(s)
+   * @returns {Promise<Collection<Snowflake, GuildMember>>}
+   */
+  async search({ query, limit = 1, cache = true } = {}) {
+    const data = await this.client.api.guilds(this.guild.id).members.search.get({ query: { query, limit } });
+    return data.reduce((col, member) => col.set(member.user.id, this.add(member, cache)), new Collection());
+  }
+
   /**
    * Prunes members from the guild based on how long they have been inactive.
    * <info>It's recommended to set options.count to `false` for large guilds.</info>

typings/index.d.ts

@@ -1984,6 +1984,7 @@ declare module 'discord.js' {
     public fetch(options?: FetchMembersOptions): Promise<Collection<Snowflake, GuildMember>>;
     public prune(options: GuildPruneMembersOptions & { dry?: false; count: false }): Promise<null>;
     public prune(options?: GuildPruneMembersOptions): Promise<number>;
+    public search(options: GuildSearchMembersOptions): Promise<Collection<Snowflake, GuildMember>>;
     public unban(user: UserResolvable, reason?: string): Promise<User>;
   }
 
@@ -2832,6 +2833,12 @@ declare module 'discord.js' {
     channel: GuildChannelResolvable | null;
   }
 
+  interface GuildSearchMembersOptions {
+    query: string;
+    limit?: number;
+    cache?: boolean;
+  }
+
   interface HTTPOptions {
     api?: string;
     version?: number;