diff --git a/src/modules/auth/email.ts b/src/modules/auth/email.ts
index 55ab3bb..ca9517d 100644
--- a/src/modules/auth/email.ts
+++ b/src/modules/auth/email.ts
@@ -2,16 +2,192 @@ import Module from "..";
 import { FunctionResponse } from "../../functions";
 import { Warning } from "../shared";
 
+interface ProfileField {
+  /**
+   * The field's unique ID.
+   */
+  id?: number;
+
+  /**
+   * The field's shortname.
+   */
+  shortname?: string;
+
+  /**
+   * The field's name.
+   */
+  name?: string;
+
+  /**
+   * The field's data type.
+   */
+  datatype?: string;
+
+  /**
+   * The field's description.
+   */
+  description?: string;
+
+  /**
+   * The field's description format code.
+   *
+   * `0` - Moodle
+   * `1` - HTML
+   * `2` - plain text
+   * `4` - Markdown
+   */
+  descriptionformat?: number;
+
+  /**
+   * The field's category ID.
+   */
+  categoryid?: number;
+
+  /**
+   * The field's category name.
+   */
+  categoryname?: string;
+
+  /**
+   * The field's sorting order.
+   */
+  sortorder?: number;
+
+  /**
+   * Whether the field is required (1)
+   * or not (0).
+   */
+  required?: number;
+
+  /**
+   * Whether the field is locked (1)
+   * or not (0).
+   */
+  locked?: number;
+
+  /**
+   * Whether the field is visible (1)
+   * or not (0).
+   */
+  visible?: number;
+
+  /**
+   * @todo Add documentation. Moodle's
+   * documentation is not helpful.
+   */
+  forceunique?: number;
+
+  /**
+   * @todo Add documentation. Moodle's
+   * documentation is not helpful.
+   */
+  signup?: number;
+
+  /**
+   * The field's default data.
+   */
+  defaultdata?: string;
+
+  /**
+   * The field's default data format code.
+   * 
+   * `0` - Moodle
+   * `1` - HTML
+   * `2` - plain text
+   * `4` - Markdown
+   */
+  defaultdataformat?: number;
+
+  /**
+   * @todo Add documentation. Moodle's
+   * documentation is not helpful.
+   */
+  param1?: string;
+
+  /**
+   * @todo Add documentation. Moodle's
+   * documentation is not helpful.
+   */
+  param2?: string;
+
+  /**
+   * @todo Add documentation. Moodle's
+   * documentation is not helpful.
+   */
+  param3?: string;
+
+  /**
+   * @todo Add documentation. Moodle's
+   * documentation is not helpful.
+   */
+  param4?: string;
+
+  /**
+   * @todo Add documentation. Moodle's
+   * documentation is not helpful.
+   */
+  param5?: string;
+}
+
 export interface SignUpSettingsResponse extends FunctionResponse {
   /**
-   * The fields that a user can provide during sign up to identify their name.
+   * The fields that a user can provide during sign
+   * up to identify their name.
    */
   namefields: string[];
 
   /**
-   * Users signing up to this Moodle site must use a password that meets this policy's requirements.
+   * Users signing up to this Moodle site must use
+   * a password that meets this policy's requirements.
+   */
+  passwordpolicy?: string;
+
+  /**
+   * The site's policy.
+   */
+  sitepolicy?: string;
+
+  /**
+   * The site's policy handler.
+   */
+  sitepolicyhandler?: string;
+
+  /**
+   * The site's default home city for a user.
+   */
+  defaultcity?: string;
+
+  /**
+   * The site's default home country for a user.
+   */
+  country?: string;
+
+  /**
+   * Required profile fields that the user must
+   * provide when signing up.
+   */
+  profilefields?: ProfileField[];
+
+  /**
+   * The site's Google reCAPTCHA public key.
+   */
+  recaptchapublickey?: string;
+
+  /**
+   * The site's Google reCAPTCHA challenge hash.
+   */
+  recaptchachallengehash?: string;
+
+  /**
+   * The site's Google reCAPTCHA challenge image.
+   */
+  recaptchachallengeimage?: string;
+
+  /**
+   * The URL Of the site's Google reCAPTCHA
+   * challenge JS.
    */
-  passwordpolicy: string;
+  recaptchachallengejs?: string;
 
   warnings?: Warning[];
 }