fix: return 400 bad request for invalid login challenge #3015

Job	Run time
Generate SDKs	2m 29s
Run Playwright end-to-end tests (postgres)	9m 38s
Run Playwright end-to-end tests (cockroach)	9m 5s
Run Playwright end-to-end tests (sqlite)	7m 45s
Run Playwright end-to-end tests (mysql)	8m 54s
Run tests and lints	23m 24s
Run end-to-end tests (postgres)	1h 10m 1s
Run end-to-end tests (cockroach)	1h 17m 57s
Run end-to-end tests (sqlite)	1h 27m 9s
Run end-to-end tests (mysql)	1h 23m 56s
Build CLI docs	2m 14s
Generate changelog	0s
Generate release	0s
Release SDKs	0s
Render version schema	0s
Draft newsletter	0s
Pending approval Slack notification	0s
Send newsletter	0s
	6h 22m 32s

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