operational error

Traceback (most recent call last):
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\engine\base.py", line 1249, in _execute_context
    cursor, statement, parameters, context
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\engine\default.py", line 580, in do_execute
    cursor.execute(statement, parameters)
sqlite3.OperationalError: no such table: employees

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\flask\app.py", line 2446, in wsgi_app
    response = self.full_dispatch_request()
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\flask\app.py", line 1951, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\flask\app.py", line 1820, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\flask\_compat.py", line 39, in reraise
    raise value
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\flask\app.py", line 1949, in full_dispatch_request
    rv = self.dispatch_request()
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\flask\app.py", line 1935, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "C:\Users\user\Desktop\Automated management system\app\blueprints\auth\views.py", line 13, in register
    if form.validate_on_submit():
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\flask_wtf\form.py", line 101, in validate_on_submit
    return self.is_submitted() and self.validate()
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\wtforms\form.py", line 310, in validate
    return super(Form, self).validate(extra)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\wtforms\form.py", line 152, in validate
    if not field.validate(self, extra):
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\wtforms\fields\core.py", line 206, in validate
    stop_validation = self._run_validation_chain(form, chain)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\wtforms\fields\core.py", line 226, in _run_validation_chain
    validator(form, self)
  File "C:\Users\user\Desktop\Automated management system\app\blueprints\auth\forms.py", line 19, in validate_email
    if Employee.query.filter_by(email=field.data).first():
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\orm\query.py", line 3240, in first
    ret = list(self[0:1])
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\orm\query.py", line 3018, in __getitem__
    return list(res)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\orm\query.py", line 3342, in __iter__
    return self._execute_and_instances(context)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\orm\query.py", line 3367, in _execute_and_instances
    result = conn.execute(querycontext.statement, self._params)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\engine\base.py", line 988, in execute
    return meth(self, multiparams, params)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\sql\elements.py", line 287, in _execute_on_connection
    return connection._execute_clauseelement(self, multiparams, params)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\engine\base.py", line 1107, in _execute_clauseelement
    distilled_params,
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\engine\base.py", line 1253, in _execute_context
    e, statement, parameters, cursor, context
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\engine\base.py", line 1473, in _handle_dbapi_exception
    util.raise_from_cause(sqlalchemy_exception, exc_info)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\util\compat.py", line 398, in raise_from_cause
    reraise(type(exception), exception, tb=exc_tb, cause=cause)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\util\compat.py", line 152, in reraise
    raise value.with_traceback(tb)
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\engine\base.py", line 1249, in _execute_context
    cursor, statement, parameters, context
  File "c:\users\user\anaconda3\envs\emsenv\lib\site-packages\sqlalchemy\engine\default.py", line 580, in do_execute
    cursor.execute(statement, parameters)
sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) no such table: employees
[SQL: SELECT employees.id AS employees_id, employees.username AS employees_username, employees.first_name AS employees_first_name, employees.last_name AS employees_last_name, employees.date_of_birth AS employees_date_of_birth, employees.date_of_first_appointment AS employees_date_of_first_appointment, employees.next_of_kin AS employees_next_of_kin, employees.age AS employees_age, employees.department_name AS employees_department_name, employees.educational_qualification AS employees_educational_qualification, employees.present_grade_level AS employees_present_grade_level, employees.post AS employees_post, employees.address AS employees_address, employees.phone_nmuber AS employees_phone_nmuber, employees.email AS employees_email, employees.marital_status AS employees_marital_status, employees.password_hash AS employees_password_hash, employees.is_admin AS employees_is_admin
FROM employees
WHERE employees.email = ?
 LIMIT ? OFFSET ?]
[parameters: ('damiloladrizzy@yahoo.com', 1, 0)]
(Background on this error at: http://sqlalche.me/e/e3q8)
127.0.0.1 - - [18/Oct/2019 15:55:22] "POST /register HTTP/1.1" 500 -