diff --git a/index.d.ts b/index.d.ts
index 48494c0..5e61337 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -148,6 +148,7 @@ declare module 'celsius-sdk' {
         first_name: string;
         last_name: string;
         middle_name?: string;
+        email?: string;
         title?: 'mr' | 'ms' | 'mrs';
         /** ISO-8601 date string **/
         date_of_birth: string;
diff --git a/lib/config.js b/lib/config.js
index b679c4a..c2049da 100644
--- a/lib/config.js
+++ b/lib/config.js
@@ -8,6 +8,7 @@
  * Contains base configuration for different environments.
  * @property {EnvironmentConfig} staging - Staging configuration
  * @property {EnvironmentConfig} production - Production configuration
+ * @property {EnvironmentConfig} localhost - Localhost configuration
  * @type {object}
  */
 const CONFIG = {
@@ -18,6 +19,10 @@ const CONFIG = {
   production: {
     baseUrl: 'https://wallet-api.celsius.network',
     publicKey: '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'
+  },
+  localhost: {
+    baseUrl: 'http://127.0.0.1:6060',
+    publicKey: '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'
   }
 }
 module.exports = {
diff --git a/lib/consts.js b/lib/consts.js
index ab9fd22..bb0c590 100644
--- a/lib/consts.js
+++ b/lib/consts.js
@@ -5,7 +5,8 @@
  */
 const ENVIRONMENT = {
   STAGING: 'staging',
-  PRODUCTION: 'production'
+  PRODUCTION: 'production',
+  LOCALHOST: 'localhost'
 }
 
 /**
diff --git a/lib/core.js b/lib/core.js
index 19165d4..cdaa802 100644
--- a/lib/core.js
+++ b/lib/core.js
@@ -62,6 +62,7 @@ const { HttpClient } = require('./http-client')
  * @property {string} first_name
  * @property {string} last_name
  * @property {string} date_of_birth
+ * @property {string} email
  * @property {string} citizenship
  * @property {string} country
  * @property {string} state