Installing odoo-12 on ubuntu-16.04 : <p>**            ERROR ? werkzeug: Error on request:
    Traceback (most recent call last):
      File "/home/eslammofreh/.local/lib/python3.5/site-packages/werkzeug/serving.py", line 270, in run_wsgi
        execute(self.server.app)
      File "/home/eslammofreh/.local/lib/python3.5/site-packages/werkzeug/serving.py", line 258, in execute
        application_iter = app(environ, start_response)
      File "/home/workplace/odoo/odoo/service/server.py", line 350, in app
        return self.app(e, s)
      File "/home/workplace/odoo/odoo/service/wsgi_server.py", line 128, in application
        return application_unproxied(environ, start_response)
      File "/home/workplace/odoo/odoo/service/wsgi_server.py", line 117, in application_unproxied
        result = odoo.http.root(environ, start_response)
      File "/home/workplace/odoo/odoo/http.py", line 1318, in <strong>call</strong>
        return self.dispatch(environ, start_response)
      File "/home/workplace/odoo/odoo/http.py", line 1291, in <strong>call</strong>
        return self.app(environ, start_wrapped)
      File "/home/eslammofreh/.local/lib/python3.5/site-packages/werkzeug/wsgi.py", line 766, in <strong>call</strong>
        return self.app(environ, start_response)
      File "/home/workplace/odoo/odoo/http.py", line 1451, in dispatch
        self.setup_db(httprequest)
      File "/home/workplace/odoo/odoo/http.py", line 1374, in setup_db
        httprequest.session.db = db_monodb(httprequest)
      File "/home/workplace/odoo/odoo/http.py", line 1535, in db_monodb
        dbs = db_list(True, httprequest)
      File "/home/workplace/odoo/odoo/http.py", line 1502, in db_list
        dbs = odoo.service.db.list_dbs(force)
      File "/home/workplace/odoo/odoo/service/db.py", line 375, in list_dbs
        with closing(db.cursor()) as cr:
      File "/home/workplace/odoo/odoo/sql_db.py", line 657, in cursor
        return Cursor(self.<strong>pool, self.dbname, self.dsn, serialized=serialized)
      File "/home/workplace/odoo/odoo/sql_db.py", line 171, in __init</strong>
        self._cnx = pool.borrow(dsn)
      File "/home/workplace/odoo/odoo/sql_db.py", line 540, in _locked
        return fun(self, *args, <strong>kwargs)
      File "/home/workplace/odoo/odoo/sql_db.py", line 608, in borrow
        **connection_info)
      File "/home/eslammofreh/.local/lib/python3.5/site-packages/psycopg2/__init__.py", line 130, in connect
        conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
    psycopg2.OperationalError: FATAL:  role "eslammofreh" does not exist - - -
    2019-03-09 18:18:59,091 1892 INFO ? odoo.sql_db: Connection to the database failed 
    2019-03-09 18:18:59,093 1892 INFO ? werkzeug: 127.0.0.1 - - [09/Mar/2019 18:18:59] "GET /favicon.ico HTTP/1.1" 500 - 0 0.000 0.005
    2019-03-09 18:18:59,098 1892 ERROR ? werkzeug: Error on request:
    Traceback (most recent call last):
      File "/home/eslammofreh/.local/lib/python3.5/site-packages/werkzeug/serving.py", line 270, in run_wsgi
        execute(self.server.app)
      File "/home/eslammofreh/.local/lib/python3.5/site-packages/werkzeug/serving.py", line 258, in execute
        application_iter = app(environ, start_response)
      File "/home/workplace/odoo/odoo/service/server.py", line 350, in app
        return self.app(e, s)
      File "/home/workplace/odoo/odoo/service/wsgi_server.py", line 128, in application
        return application_unproxied(environ, start_response)
      File "/home/workplace/odoo/odoo/service/wsgi_server.py", line 117, in application_unproxied
        result = odoo.http.root(environ, start_response)
      File "/home/workplace/odoo/odoo/http.py", line 1318, in __call__
        return self.dispatch(environ, start_response)
      File "/home/workplace/odoo/odoo/http.py", line 1291, in __call__
        return self.app(environ, start_wrapped)
      File "/home/eslammofreh/.local/lib/python3.5/site-packages/werkzeug/wsgi.py", line 766, in __call__
        return self.app(environ, start_response)
      File "/home/workplace/odoo/odoo/http.py", line 1451, in dispatch
        self.setup_db(httprequest)
      File "/home/workplace/odoo/odoo/http.py", line 1374, in setup_db
        httprequest.session.db = db_monodb(httprequest)
      File "/home/workplace/odoo/odoo/http.py", line 1535, in db_monodb
        dbs = db_list(True, httprequest)
      File "/home/workplace/odoo/odoo/http.py", line 1502, in db_list
        dbs = odoo.service.db.list_dbs(force)
      File "/home/workplace/odoo/odoo/service/db.py", line 375, in list_dbs
        with closing(db.cursor()) as cr:
      File "/home/workplace/odoo/odoo/sql_db.py", line 657, in cursor
        return Cursor(self.__pool, self.dbname, self.dsn, serialized=serialized)
      File "/home/workplace/odoo/odoo/sql_db.py", line 171, in __init__
        self._cnx = pool.borrow(dsn)
      File "/home/workplace/odoo/odoo/sql_db.py", line 540, in _locked
        return fun(self, *args, **kwargs)
      File "/home/workplace/odoo/odoo/sql_db.py", line 608, in borrow
        **connection_info)
      File "/home/eslammofreh/.local/lib/python3.5/site-packages/psycopg2/__init__.py", line 130, in connect
        conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
    psycopg2.OperationalError: FATAL:  role "eslammofreh" does not exist -</strong></p>
