Use email address as username

Question

Is there a specific or preferred way to set the username for new user registrations to be their email address?

At the moment my user signup form contains both fields:

<!-- Username -->
  <label for="username">Username</label>
    <input type="text" id="username" name="username" placeholder="joesmith" {%- if account is defined %} value="{{ account.username }}"{% endif -%}/>
    {% if account is defined %}
        {{ _self.errorList(account.getErrors('username')) }}
    {% endif %}

<!-- Email -->
  <label for="email" >Email</label>
    <input type="text" id="email" name="email" {%- if account is defined %} value="{{ account.email }}"{% endif -%}/ autocapitalize=off autocorrect=off>
    {% if account is defined %}
        {{ _self.errorList(account.getErrors('email')) }}
    {% endif %}

Answer 1

I believe you're looking for the conveniently named useEmailAsUsername config setting.

When that is set to true, any new user that is saved with a valid email address will have that copied over to the username field as well.