usuername is taken in as a tuple, added a comma to prevent this

app.py

@@ -1,4 +1,4 @@
-from flask import Flask, render_template, request, session
+from flask import Flask, render_template, request, session, redirect
 from helpers import login_required
 from werkzeug.security import check_password_hash, generate_password_hash
 import sqlite3
@@ -35,7 +35,7 @@ def register():
             return apology("passwords must match", 400)
 
         rows = db.execute(
-            "SELECT * FROM users WHERE username = ?", request.form.get("username")
+            "SELECT * FROM users WHERE username = ?", (request.form.get("username"),)
         )
 
         if len(rows) >= 1:

templates/login.html

@@ -8,11 +8,11 @@
     <form action="/login" method="post">
         <div class="py-1 text-center">
             <label for="exampleInputEmail1">Email address</label>
-            <input type="email" class="form-control mx-auto w-auto" id="exampleInputEmail1" aria-describedby="emailHelp">
+            <input type="email" class="form-control mx-auto w-auto" id="username" aria-describedby="emailHelp">
         </div>
         <div class="py-1 text-center">
             <label for="exampleInputPassword1">Password</label>
-            <input type="password" class="form-control mx-auto w-auto" id="exampleInputPassword1">
+            <input type="password" class="form-control mx-auto w-auto" id="password">
         </div>
         <div class="py-3 text-center">
             <button type="submit" class="btn btn-primary">Submit</button>

templates/register.html

@@ -7,15 +7,15 @@
 {% block main %}
     <form action="/register" method="post">
         <div class="py-1 text-center">
-            <label for="Username">Email address</label>
+            <label for="username">Email address</label>
             <input autocomplete="off" autofocus class="form-control mx-auto w-auto" name="username" type="text">
         </div>
         <div class="py-1 text-center">
-            <label for="Password">Password</label>
+            <label for="password">Password</label>
             <input class="form-control mx-auto w-auto" name="password" type="password">
         </div>
         <div class="py-1 text-center">
-            <label for="Confirmation">Confirmation</label>
+            <label for="confirmation">Confirmation</label>
             <input class="form-control mx-auto w-auto" name="confirmation" type="password">
         </div>
         <div class="py-3 text-center">