Separates query for looking up station id

__init__.py

                 error = 'Email is required'
             else:
                 db = get_db()
+                station_id = db.execute(
+                    'SELECT s_id FROM station WHERE nombre_empleado=?',
+                    (place_holder)
+                ).fetchone()
+                db.execute(
+                    'UPDATE station SET last_turn = last_turn + 1 WHERE s_id=?',
+                    (station_id)
+                )
+                turn = db.execute(
+                    'SELECT last_turn FROM station WHERE s_id=?',
+                    (station_id)
+                )
                 db.execute(
                     'INSERT INTO turno (cName, cEmail, timeArrival, station)'
-                    ' VALUES (?, ?, ?, (SELECT s_id FROM station WHERE nombre_empleado=?))',
-                    (cName, cEmail, 'testin', 'Fulano de Tal')
+                    ' VALUES (?, ?, ?, ?)',
+                    (cName, cEmail, 'testin', station_id)
                 )
             db.commit()