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I add a layer using an authentification config ID using PyQGIS:

uri = QgsDataSourceUri()
uri.setConnection(HOST, PORT, DB, None, None, QgsDataSourceUri.SslPrefer, pg_auth_id)
QgsVectorLayer(uri.uri(), "mylayer", "postgres")

In the project, the credentials are written in clear text in the project file:

<datasource>dbname='pub' host=geodb.rootso.org port=5432 user='xxxxxx' password='xxxxxx'

Is it possible to avoid this? How?

1 Answer 1

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Solution is to call QgsDataSourceUri.uri with False:

QgsVectorLayer(uri.uri(False), "mylayer", "postgres")

see docs: https://qgis.org/pyqgis/master/core/QgsDataSourceUri.html#qgis.core.QgsDataSourceUri.uri

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