fix(grant): change guardian import access API

[rahmatrhd]

apply this change: raystack/proton@d9b61bb

[coveralls]

Pull Request Test Coverage Report for Build 3270563828

• 16 of 27 (59.26%) changed or added relevant lines in 2 files are covered.
• 144 unchanged lines in 9 files lost coverage.
• Overall coverage increased (+0.2%) to 74.013%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
core/grant/service.go	0	3	0.0%
api/handler/v1beta1/grant.go	16	24	66.67%

Files with Coverage Reduction	New Missed Lines	%
internal/store/postgres/policy_repository.go	6	78.85%
core/approval/service.go	10	75.0%
internal/store/postgres/approval_repository.go	10	88.37%
internal/store/postgres/resource_repository.go	11	84.89%
core/resource/service.go	12	45.35%
internal/store/postgres/appeal_repository.go	13	89.34%
internal/store/postgres/provider_repository.go	14	85.6%
core/policy/service.go	28	58.82%
core/provider/service.go	40	60.0%

Totals
Change from base Build 3240858092:	0.2%
Covered Lines:	5944
Relevant Lines:	8031

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💛 - Coveralls