title: How to make Django form Field Unique?
body: <p>I have a Signup form Where I want to make data of email and mobile Number Field to be Unique....</p>
  
  <pre><code>class SignUpForm(UserCreationForm):
      email = forms.EmailField(max_length=254, help_text='Required. Inform a valid email address.', unique=True)
      mobile_no = forms.CharField(validators=[max_length=17, initial='+91', unique=True)  
  </code></pre>
  
  <p>I am Currently using <code>unique=True</code> but it raise Error as...</p>
  
  <pre><code>TypeError: __init__() got an unexpected keyword argument 'unique'
  </code></pre>