Extraigo toda la información del cliente a través de una API y la imprimo en la consola.

estoy haciendo esto con

 if (this.readyState === 4) { console.log('Body:', this.responseText); } };

que proporciona todos los datos siguientes (modificados por razones obvias)

{"id":2,"userIdent":"11","randomInfo":null,"isLead":false,"clientType":1,"companyName":null,"companyRegistrationNumber":null,"companyTaxId":null,"companyWebsite":null,"street1":"1234 Happy Rd","street2":null,"city":"Smile City","countryId":249,"stateId":22,"zipCode":"12345","fullAddress":"1234 Happy Rd, Smile City, MI","invoiceStreet1":null,"invoiceStreet2":null,"invoiceCity":null,"invoiceStateId":null,"invoiceCountryId":null,"invoiceZipCode":null,"invoiceAddressSameAsContact":true,"note":null,"sendInvoiceByPost":null,"invoiceMaturityDays":null,"stopServiceDue":null,"stopServiceDueDays":null,"organizationId":2,"tax1Id":null,"tax2Id":null,"tax3Id":null,"registrationDate":"2022-03-07T00:00:00-0500","leadConvertedAt":null,"companyContactFirstName":null,"companyContactLastName":null,"isActive":false,"firstName":"boop":[],"accountBalance":0.0,"accountCredit":0.0,"accountOutstanding":0.0,"currencyCode":"USD","organizationName":"My Company","bankAccounts":[],"tags":[],"invitationEmailSentDate":null,"avatarColor":"#ef6c00","addressGpsLat":11.22,"addressGpsLon":-22.11,"isArchived":false,"generateProformaInvoices":null,"usesProforma":false,"hasOverdueInvoice":false,"hasOutage":true,"hasSuspendedService":false,"hasServiceWithoutDevices":false,"referral":null}

Solo quiero extraer el valor asociado con, por ejemplo, "userIdent", que sería 11, pero no estoy seguro de cómo hacerlo cuando extraigo los datos de la API.