fix: do better validation for existing tokens #17535

Job	Run time
Determine jobs to run	38s
Build Turborepo (ubuntu, self-hosted, linux, x64, metal)	1m 32s
Build Turborepo (macos, macos-latest)	10m 5s
Turborepo Examples	0s
Turbopack TypeScript files	0s
Build Turborepo (windows, windows-latest)	9m 56s
JS Package Tests	0s
Rust lints	50s
Turbopack rust check	0s
Turborepo rust check	1m 25s
Formatting	0s
Check next-swc	0s
Turbopack Rust testing benchmarks on linux	0s
Turbopack Rust testing benchmarks on ${{ matrix.os.name }}	0s
Turbopack rust clippy	0s
Turbopack Rust testing on ubuntu	0s
Turbopack Rust testing on ${{ matrix.os.name }}	0s
Upload Test results	33s
Turborepo rust clippy	1m 26s
Turborepo Rust testing on ubuntu	1m 52s
Turborepo Rust testing on macos	10m 1s
Turborepo Rust testing on windows	18m 14s
Turborepo Integration (ubuntu-latest)	8m 11s
Turborepo Integration (macos-latest)	17m 15s
Turborepo Integration (windows-latest)	24m 47s
Ok	4s
Done	4s
Cleanup / cleanup	2s
	1h 46m 55s

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