fix: set correct valid methods env var

[sweatybridge]

What kind of change does this PR introduce?

Bug fix

What is the new behavior?

Use the currently accepted env var for auth.

Additional context

relates to supabase/auth#2334

[coveralls]

Pull Request Test Coverage Report for Build 21520998173

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 8 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.05%) to 55.437%

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Files with Coverage Reduction	New Missed Lines	%
internal/debug/postgres.go	3	66.09%
internal/gen/keys/keys.go	5	12.9%

Totals
Change from base Build 21513502407:	-0.05%
Covered Lines:	7107
Relevant Lines:	12820

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💛 - Coveralls