refactor: 💡 account and auth-method abilities (#1691)

* refactor: 💡 account and auth-method abilities

* refactor: 💡 add update & delete abilities & unit tests

addons/api/addon/abilities/account.js

@@ -11,6 +11,30 @@ import ModelAbility from './model';
 export default class AccountAbility extends ModelAbility {
   // =permissions
 
+  /**
+   * Only "known" account types may be read.
+   * @type {boolean}
+   */
+  get canRead() {
+    return !this.model.isUnknown && this.hasAuthorizedAction('read');
+  }
+
+  /**
+   * Only "known" account types may be updated.
+   * @type {boolean}
+   */
+  get canUpdate() {
+    return !this.model.isUnknown && this.hasAuthorizedAction('update');
+  }
+
+  /**
+   * Only "known" account types may be deleted.
+   * @type {boolean}
+   */
+  get canDelete() {
+    return !this.model.isUnknown && this.hasAuthorizedAction('delete');
+  }
+
   /**
    * @type {boolean}
    */