```
mc admin group list myminio
```

### 8. Configure `mc`

```
mc alias set myminio-newuser http://localhost:9000 newuser newuser123 --api s3v4
mc cat myminio-newuser/my-bucketname/my-objectname
```

### Policy Variables

You can use policy variables in the *Resource* element and in string comparisons in the *Condition* element.

## Invoke Lambda transformation via PresignedGET

Following example shows how you can use [`minio-go` PresignedGetObject](https://min.io/docs/minio/linux/developers/go/API.html#presignedgetobject-ctx-context-context-bucketname-objectname-string-expiry-time-duration-reqparams-url-values-url-url-error)
```go
package main

import (
	"context"
	"log"
	"net/url"
	"time"
	"fmt"

	"github.com/minio/minio-go/v7"

			t.Fatalf("Erasure Object upload failed: <ERROR> %s", err)
		}
		names[i] = ObjectToDelete{
			ObjectV: ObjectV{
				ObjectName: objInfo.Name,
				VersionID:  objInfo.VersionID,
			},
		}

	}
	names = append(names, ObjectToDelete{
		ObjectV: ObjectV{
			ObjectName: "dir/obj1",
			VersionID:  mustGetUUID(), // add a non-existent UUID.
		},
	})

				globalBucketConnStats.incS3OutputBytes(bucket, int64(tc.ResponseRecorder.Size()))
				globalBucketHTTPStats.updateHTTPStats(bucket, api, tc.ResponseRecorder)
			}
		}
	}
}

// Returns "/bucketName/objectName" for path-style or virtual-host-style requests.
func getResource(path string, host string, domains []string) (string, error) {
	if len(domains) == 0 {
		return path, nil
	}

			}
		}
	}

	var dsc ReplicateDecision
	if oi.DeleteMarker || !oi.VersionPurgeStatus.Empty() {
		dsc = checkReplicateDelete(GlobalContext, oi.Bucket, ObjectToDelete{
			ObjectV: ObjectV{
				ObjectName: oi.Name,
				VersionID:  oi.VersionID,
			},
		}, oi, ObjectOptions{
			Versioned:        globalBucketVersioningSys.PrefixEnabled(oi.Bucket, oi.Name),

			Groups:          cred.Groups,
			Action:          policy.ListBucketAction,
			BucketName:      bucketName,
			ConditionValues: getConditionValues(r, "", cred),
			IsOwner:         owner,
			ObjectName:      "",
			Claims:          cred.Claims,
		}) {
			rd = true
		}

		if globalIAMSys.IsAllowed(policy.Args{
			AccountName:     cred.AccessKey,
			Groups:          cred.Groups,

		}

		// Update context bucket & object names for correct S3 XML error response
		reqInfo := logger.GetReqInfo(ctx)
		reqInfo.BucketName = srcBucket
		reqInfo.ObjectName = srcObject
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}
	defer gr.Close()
	srcInfo := gr.ObjInfo

	// maximum Upload size for object in a single CopyObject operation.

			Groups:          cred.Groups,
			Action:          policy.GetObjectAction,
			BucketName:      bucketName,
			ConditionValues: getConditionValues(r, "", cred),
			IsOwner:         owner,
			ObjectName:      "",
			Claims:          cred.Claims,
		}) {
			rd = true
		}

		if globalIAMSys.IsAllowed(policy.Args{
			AccountName:     cred.AccessKey,
			Groups:          cred.Groups,

) {
	reqInfo := logger.GetReqInfo(ctx)
	errorResponse := APIErrorResponse{
		Code:       err.Code,
		Message:    errBody,
		Resource:   reqURL.Path,
		BucketName: reqInfo.BucketName,
		Key:        reqInfo.ObjectName,
		RequestID:  w.Header().Get(xhttp.AmzRequestID),
		HostID:     globalDeploymentID(),
	}
	encodedErrorResponse := encodeResponseJSON(errorResponse)

	return xxh3.HashString(f.TransitionedObject.Tier + f.TransitionedObject.Name)
}

func (n newerNoncurrentTask) OpHash() uint64 {
	return xxh3.HashString(n.bucket + n.versions[0].ObjectV.ObjectName)
}

func (j jentry) OpHash() uint64 {
	return xxh3.HashString(j.TierName + j.ObjName)
}

func (e expiryTask) OpHash() uint64 {
	return xxh3.HashString(e.objInfo.Bucket + e.objInfo.Name)
}