The backup operation fails during the quiesce operation if the user store key has an invalid user name, password, or port number.
SCC-00164: Application quiesce for plug-in [hana] failed with exit code [1] and with error: [hdb-00004] Connection failed, as the connection to the HANA node was refused. Connecting to database (SID: H73) using the following HDB User Store Keys: [HS73] failed with error: [hdb-00004] Connection failed, as the connection to the HANA node was refused. Unable to execute hdbsql statement using the hdbuserstore keys provided in the config. Update the userstore keys and try again.
Update the user store key and try again.