setting domain authority doesn't work / isn't understandable

[aspiers]

Variable "$adminDids" of type "[String!]" used in position expecting type "String".: {"response":{"data":null,"errors":[{"message":"Variable \"$adminDids\" of type \"[String!]\" used in position expecting type \"String\".","locations":[{"line":4,"column":5},{"line":12,"column":18}]}],"status":400,"headers":{},"body":"{\"data\":null,\"errors\":[{\"message\":\"Variable \\\"$adminDids\\\" of type \\\"[String!]\\\" used in position expecting type \\\"String\\\".\",\"locations\":[{\"line\":4,\"column\":5},{\"line\":12,\"column\":18}]}]}"},"request":{"query":"\n mutation UpdateSettings(\n $domainAuthority: String\n $adminDids: [String!]\n $relayUrl: String\n $plcDirectoryUrl: String\n $jetstreamUrl: String\n $oauthSupportedScopes: String\n ) {\n updateSettings(\n domainAuthority: $domainAuthority\n adminDids: $adminDids\n relayUrl: $relayUrl\n plcDirectoryUrl: $plcDirectoryUrl\n jetstreamUrl: $jetstreamUrl\n oauthSupportedScopes: $oauthSupportedScopes\n ) {\n domainAuthority\n adminDids\n relayUrl\n plcDirectoryUrl\n jetstreamUrl\n oauthSupportedScopes\n }\n }\n","variables":{"domainAuthority":"org.hypercerts","relayUrl":"https://relay1.us-west.bsky.network","plcDirectoryUrl":"https://plc.directory","jetstreamUrl":"wss://jetstream2.us-west.bsky.network/subscribe","oauthSupportedScopes":"atproto transition:generic","adminDids":["did:plc:ucuwh64u4r5pycnlvrqvty3j"]}}}