Werk #5002: Fixed possible exception related to multisite_user_connectors on login failures

Component	User interface
Title	Fixed possible exception related to multisite_user_connectors on login failures
Date	Jul 20, 2017
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.4.0p9 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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