Update register method

@@ -65,7 +65,9 @@ def register():
     print(msg)
     sql = "SELECT student_id FROM student WHERE student_id = %s;"
     cursor.execute(sql, (student_id))
-    if cursor.rowcount == 0:
+    if cursor.rowcount > 0:
+        send = jsonify({'status': 'already', 'student_id': student_id})
+        return send
     sql = "INSERT INTO student(student_id, student_name) VALUES (%s, %s)"
     cursor.execute(sql, (student_id, student_name))
     sql = "INSERT INTO lecture_students(lecture_id, student_id) VALUES (%s, %s)"

 [verification_server]
 model=models/20200816-080621
-threshold=0.8
+threshold=0.75
 image_size=160

@@ -216,7 +216,7 @@ function main()
     <div>
     <!-- Header -->
         <header class="w3-container w3-center w3-padding-32"> 
-            <h1><b>얼굴 등록</b></h1>
+            <h1><b>얼굴 인식 출석 시스템</b></h1>
             <p>Made by <span class="w3-tag">정해갑</span></p>
         </header>
     </div>