message: chore: add default dev/username back
diff: @@ -15,7 +15,7 @@ import { Logger } from '../logger';
  import { Messages } from '../messages';
  import { sfdc } from '../util/sfdc';
  import { SfdcUrl } from '../util/sfdcUrl';
  -import { ORG_CONFIG_ALLOWED_PROPERTIES } from '../org/orgConfigProperties';
  +import { ORG_CONFIG_ALLOWED_PROPERTIES, OrgConfigProperties } from '../org/orgConfigProperties';
  import { ConfigFile } from './configFile';
  import { ConfigContents, ConfigValue } from './configStore';
  @@ -105,6 +105,22 @@ export interface ConfigPropertyMetaInput {
  }
  export enum SfdxPropertyKeys {
  + /**
  + * Username associated with the default dev hub org.
  + *
  + * @deprecated Replaced by OrgConfigProperties.TARGET_DEV_HUB in v3 {@link https://github.com/forcedotcom/sfdx-core/blob/v3/MIGRATING_V2-V3.md#config}
  + * will remain in v3 for the foreseeable future so that `sfdx-core` can map between `sf` and `sfdx` config values
  + */
  + DEFAULT_DEV_HUB_USERNAME = 'defaultdevhubusername',
  +
  + /**
  + * Username associate with the default org.
  + *
  + * @deprecated Replaced by OrgConfigProperties.TARGET_ORG in v3 {@link https://github.com/forcedotcom/sfdx-core/blob/v3/MIGRATING_V2-V3.md#config}
  + * will remain in v3 for the foreseeable future so that `sfdx-core` can map between `sf` and `sfdx` config values
  + */
  + DEFAULT_USERNAME = 'defaultusername',
  +
  /**
  * The sid for the debugger configuration.
  */
  @@ -171,6 +187,20 @@ export const SFDX_ALLOWED_PROPERTIES = [
  failedMessage: messages.getMessage('invalidApiVersion'),
  },
  },
  + {
  + // will remain in v3 for the foreseeable future so that `sfdx-core` can map between `sf` and `sfdx` config values
  + key: SfdxPropertyKeys.DEFAULT_DEV_HUB_USERNAME,
  + newKey: OrgConfigProperties.TARGET_DEV_HUB,
  + deprecated: true,
  + description: messages.getMessage('defaultDevHubUsername'),
  + },
  + {
  + // will remain in v3 for the foreseeable future so that `sfdx-core` can map between `sf` and `sfdx` config values
  + key: SfdxPropertyKeys.DEFAULT_USERNAME,
  + newKey: OrgConfigProperties.TARGET_ORG,
  + deprecated: true,
  + description: messages.getMessage('defaultUsername'),
  + },
  {
  key: SfdxPropertyKeys.ISV_DEBUGGER_SID,
  description: messages.getMessage(SfdxPropertyKeys.ISV_DEBUGGER_SID),
  