If the externalauth flag is set, don't attempt to parse out a user name

and password since there won't be any!

Author: anthony-tuininga

doc/src/release_notes.rst

@@ -24,6 +24,7 @@ Thick Mode Changes
 
 #)  Fixed bug when using external authentication with a TNS alias
     (`issue 178 <https://github.com/oracle/python-oracledb/issues/178>`__).
+#)  Fixed bug when using external authentication with an EZ connect string.
 
 Common Changes
 ++++++++++++++

src/oracledb/impl/base/connect_params.pyx

@@ -608,7 +608,7 @@ cdef class ConnectParamsImpl:
         """
         if kwargs:
             self.set(kwargs)
-        if self.user is None and dsn is not None:
+        if self.user is None and not self.externalauth and dsn is not None:
             user, password, dsn = self.parse_dsn_with_credentials(dsn)
             self.set(dict(user=user, password=password))
         if dsn is not None and thin: