autoform pure schema validation create user

client.js

Template.registerHelper(Schemas, Schema);

lib.js

Schemas.UserRegister = new SimpleSchema({
    username: {
        type: String,
        regEx: /^[a-z0-9A-Z_]{3,15}$/
    },
    email: {
        type: String,
        // this must be optional if you also use other login services like facebook,
        // but if you use only accounts-password, then it can be required
        regEx: SimpleSchema.RegEx.Email
    }
    password: {
    type: String,
    label: "Enter a password",
    min: 8
    },
    confirmPassword: {
      type: String,
      label: "Enter the password again",
      min: 8,
      custom: function () {
        if (this.value !== this.field('password').value) {
          return "passwordMismatch";
        }
      }
    }
});

server.js

Meteor.methods({
  insertUser: function(doc, modif, userId) {
   
   // if you have autValue you need to clean first
   
    // Important server-side check for security and data integrity
    check(doc,Schemas.User);
    
    var options = {
                username: doc.username,
                email: doc.email,
                password: doc.password
            };
      var userId = Accounts.createUser(options);
  }
});

template.html

 <template name="userRegister">
 {{#autoForm schema=Schemas.UserRegister id="userForm" meteormethod="insertUser" type="method"}}
  <fieldset>
    <legend>Contact Us</legend>
    {{> afQuickField name="username"}}
    {{> afQuickField name="email" id="email"}}
    {{> afQuickField name="password"}}
    {{> afQuickField name="confirmPassword"}}
    <div>
      <button type="submit" class="btn btn-primary">Submit</button>
    </div>
  </fieldset>
  {{/autoForm}}
  </template>