in src/PowerShell/AzPSScriptBuilder.ts [88:91]
static loginWithUserAssignedIdentity(loginConfig: LoginConfig): string {
let cmdletSuffix = `-AccountId '${loginConfig.servicePrincipalId}'`;
return AzPSScriptBuilder.psLoginCmdlet(loginConfig.authType, loginConfig.environment, loginConfig.tenantId, loginConfig.subscriptionId, cmdletSuffix);
}