API keys: Add last_used_at and docs changes for migration (#64293)

* feat: last_used_at for apikeys

* add: docs and copy changes

* refactor: use br correctly

* remove docs

* removed more docs

pkg/api/apikey.go

@@ -47,6 +47,7 @@ func (hs *HTTPServer) GetAPIKeys(c *contextmodel.ReqContext) response.Response {
 			Name:       t.Name,
 			Role:       t.Role,
 			Expiration: expiration,
+			LastUsedAt: t.LastUsedAt,
 		}
 	}
 

pkg/api/dtos/apikey.go

@@ -22,5 +22,6 @@ type ApiKeyDTO struct {
 	Name          string                 `json:"name"`
 	Role          org.RoleType           `json:"role"`
 	Expiration    *time.Time             `json:"expiration,omitempty"`
+	LastUsedAt    *time.Time             `json:"lastUsedAt,omitempty"`
 	AccessControl accesscontrol.Metadata `json:"accessControl,omitempty"`
 }