fixed list, handled wrong email case, adjusted template

server.py

@@ -26,9 +26,11 @@ def index():
 
 @app.route('/showSummary',methods=['POST'])
 def showSummary():
-    club = [club for club in clubs if club['email'] == request.form['email']][0]
-    return render_template('welcome.html',club=club,competitions=competitions)
-
+    club = [club for club in clubs if club['email'] == request.form['email']]
+    if club:
+        return render_template('welcome.html', club=club[0], competitions=competitions)
+    flash("The email isn't found")
+    return redirect(url_for('index'))
 
 @app.route('/book/<competition>/<club>')
 def book(competition,club):
@@ -56,4 +58,4 @@ def purchasePlaces():
 
 @app.route('/logout')
 def logout():
-    return redirect(url_for('index'))
+    return redirect(url_for('index'))