HELP HELP FATAL: password authentication failed for user "postgres"

cqn some body helps me to correct this error while running python manager.py runeserver 

(analyseprotection) flavien@flavien-VirtualBox:~/MyProjects/alertprot$ python manage.py runserver
Performing system checks...

System check identified no issues (0 silenced).
Unhandled exception in thread started by <function wrapper at 0xadc8d72c>
Traceback (most recent call last):
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 228, in wrapper
    fn(*args, **kwargs)
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 127, in inner_run
    self.check_migrations()
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/core/management/base.py", line 422, in check_migrations
    executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 20, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/migrations/loader.py", line 52, in __init__
    self.build_graph()
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/migrations/loader.py", line 210, in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 65, in applied_migrations
    self.ensure_schema()
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/migrations/recorder.py", line 52, in ensure_schema
    if self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor()):
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/backends/base/base.py", line 254, in cursor
    return self._cursor()
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/backends/base/base.py", line 229, in _cursor
    self.ensure_connection()
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
    self.connect()
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/backends/base/base.py", line 213, in ensure_connection
    self.connect()
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/backends/base/base.py", line 189, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/django/db/backends/postgresql/base.py", line 176, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/home/flavien/MyProjects/analyseprotection/local/lib/python2.7/site-packages/psycopg2/__init__.py", line 126, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: FATAL:  password authentication failed for user "postgres"
FATAL:  password authentication failed for user "postgres"

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