fixed tests creds + added authprovider to client solver

Signed-off-by: Sam Alba <sam.alba@gmail.com>

dagger/client.go

@@ -19,6 +19,7 @@ import (
 	_ "github.com/moby/buildkit/client/connhelper/dockercontainer" // import the container connection driver
 	"github.com/moby/buildkit/client/llb"
 	bkgw "github.com/moby/buildkit/frontend/gateway/client"
+	"github.com/moby/buildkit/session"
 
 	// docker output
 	"dagger.io/go/pkg/buildkitd"
@@ -101,9 +102,13 @@ func (c *Client) buildfn(ctx context.Context, deployment *Deployment, fn ClientD
 		localdirs[label] = abs
 	}
 
+	// buildkit auth provider (registry)
+	auth := newRegistryAuthProvider()
+
 	// Setup solve options
 	opts := bk.SolveOpt{
 		LocalDirs: localdirs,
+		Session:   []session.Attachable{auth},
 	}
 
 	// Call buildkit solver
@@ -113,8 +118,6 @@ func (c *Client) buildfn(ctx context.Context, deployment *Deployment, fn ClientD
 		Msg("spawning buildkit job")
 
 	resp, err := c.c.Build(ctx, opts, "", func(ctx context.Context, gw bkgw.Client) (*bkgw.Result, error) {
-		// buildkit auth provider (registry)
-		auth := newRegistryAuthProvider()
 		s := NewSolver(c.c, gw, ch, auth, c.noCache)
 
 		lg.Debug().Msg("loading configuration")