Add deleteall command

src/commands/admin/deleteall.js

@@ -0,0 +1,39 @@
+const Command = require('../../structures/Command');
+const Util = require('../../util');
+
+module.exports = class DeleteAll extends Command {
+  get name() { return 'deleteall'; }
+
+  get _options() { return {
+    aliases: ['delall'],
+    permissions: ['admin'],
+    minimumArgs: 0
+  }; }
+
+  async exec(message) {
+    await Util.LBRY.syncPairs(this.client);
+    const pairs = await this.client.sqlite.getAll();
+
+    if (!await this.client.messageAwaiter.confirm(message, {
+      header:
+        `Are you sure you want to delete **all** ${pairs.length} accounts?`
+    })) return;
+
+    for (const pair of pairs) {
+      try {
+        await Util.LBRY.deleteAccount(this.client, pair.discordID, pair.lbryID);
+      } catch (e) {
+        return message.channel.createMessage(
+          'Failed to delete an account. An error most likely occured while backing up the wallet.' +
+          `\n\`\`\`\n${e.toString()}\`\`\``
+        );
+      }
+    }
+    return message.channel.createMessage('Deleted all accounts.');
+  }
+
+  get metadata() { return {
+    category: 'Admin',
+    description: 'Deletes all accounts in the database.'
+  }; }
+};