start pulling in the github api client wrapper

Signed-off-by: Meredith Lancaster <malancas@github.com>

pkg/cmd/attestation/github/client.go

@@ -0,0 +1,19 @@
+package github
+
+import "github.com/cli/cli/v2/api"
+
+type Client interface {
+	GetByRepoAndDigest(repo, digest string, limit int) ([]*Attestation, error)
+	GetByOwnerAndDigest(owner, digest string, limit int) ([]*Attestation, error)
+}
+
+type LiveClient struct {
+	apiClient api.Client
+}
+
+func NewLiveClient() (*LiveClient, error) {
+	apiClient := api.NewClientFromHTTP(httpClient)
+	return &LiveClient{
+		apiClient: apiClient,
+	}, nil
+}