Depending on the property management company, they may allow a co-signer/guarantor to be added to your application to qualify. Some property management companies have more strict qualifying requirements for co-signers as they are typically only added to qualify financially (income or credit). However, not all property management companies accept co-signers/guarantors.
If the property management company allows co-signers/guarantors, you will see an "Applicants and Guarantors" button under the property/unit name. Please feel free to add their email address, select the appropriate role (applicant or guarantor) and click invite.