panic: runtime error: invalid memory address or nil pointer dereference
--
  | [signal SIGSEGV: segmentation violation code=0x1 addr=0x28 pc=0xc7198e]
  |  
  | goroutine 1 [running]:
  | github.com/googleapis/librarian/internal/github.newClientWithHTTP({0xc00003e017, 0x5d}, 0x0, 0x0?)
  | /src/internal/github/github.go:62 +0x2e
  | github.com/googleapis/librarian/internal/github.NewClient(...)
  | /src/internal/github/github.go:57
  | github.com/googleapis/librarian/internal/automation.RunCommand({0x1109f38, 0x18b47e0}, {0x7ffda5cefe4d, 0xf}, {0x7ffda5cefe2a, 0x18}, 0x1, 0x1, 0x0)
  | /src/internal/automation/trigger.go:77 +0x16e
  | github.com/googleapis/librarian/internal/automation.Run({0xc00011a130?, 0xc000106068?, 0xc00005c740?})
  | /src/internal/automation/cli.go:35 +0x137
  | main.main()
  | /src/cmd/automation/main.go:29 +0x49