updated login label

Author: barreraalexander

src/templates/accounts/login.html

@@ -40,13 +40,13 @@ <h3 class="font-weight-bolder text-info text-gradient">
 
                   <form role="form text-left" method="POST" action="{{ url_for('signin') }}">
 
-                    <label>Username</label>
+                    <label>Email</label>
                     <div class="mb-3">
                       <input
                         id="username"
                         class="form-control" 
                         name="username"
-                        placeholder="Username"
+                        placeholder="Email"
                         type="text"
                         required
                       >