无法通过Go中的松弛状态发送通知

I am trying to use the Slack API to send notifications when one of my company's Loan Specialists or Risk Analysts are assigned to a casefile.

Here is the Update function that sends Updates to a casefile to our database, which is where I call the slack notification functions I mention above.

func (r *Routes) UpdateCasefile(c echo.Context) error {
    var ur update.UpdateRequest

    err := c.Bind(&ur)
    if err != nil {
        return handleErr(err, "Error binding JSONUpdateRequest")
    }

    if err := ur.ToGorm(r.db, &casefile.Casefile{}).Error; err != nil {
        return handleErr(err, "Error updating Casefile")
    }

    var updated casefile.Casefile
    if err := r.db.Where("id = ?", ur.EntityID).First(&updated).Error;
    err != nil {
        return handleErr(err, "Error recalling updated Casefile")
    }

    cf := &casefile.Casefile{
        ID:                     updated.ID,
        Name:                   updated.Name,
        LoanAmount:             updated.LoanAmount,
        AssignedLoanSpecialist: updated.AssignedLoanSpecialist,
        AssignedRiskAnalyst:    updated.AssignedRiskAnalyst,
        Business:               updated.Business,
    }

    if ur.Updates["assigned_risk_analyst"] != nil {
        NotifyRiskAnalyst(cf)
    }

    if ur.Updates["assigned_loan_specialist"] != nil {
        NotifyLoanSpecialist(cf)
    }

    go func() {
        events.Bus.Events <- &events.EventMessage{
            EventType: events.EventActivity,
            Payload: &casefile.Activity{
                CasefileID: ur.EntityID,
                Type:       "UPDATE",
                User:       auth.GetEmail(c),
                Message:    ur.FormatUpdateMessage(),
             },
         }
    }()

    return c.JSON(http.StatusOK, updated)
}

Here are the functions that are supposed to send notifications via one of our slack channels when a Loan Specialist or Risk Analyst are assigned to a casefile.

func NotifyRiskAnalyst(cf *casefile.Casefile) {
    title := fmt.Sprintf("Casefile  <https://COMPANYWEBSITE/case/%s|%s>, assigned to <@%s> at %s", cf.ID, cf.Name, cf.AssignedRiskAnalyst, cf.CreatedAt.Format("2006-01-02 15:04 -0700 MST"))

    err := common.NewSlackNotifier("#test").Notify(common.SlackMessage{
        Attachments: []common.SlackAttachment{
            {
                Color:    "#008BF8",
                Fallback: title,
                Pretext:  title,
                Fields: []common.SlackField{
                    {
                        Title: cf.Name,
                        Value:   fmt.Sprintf("https:/COMPANYWEBSITE/case/%s", cf.ID),
                    },
                },
            },
        }})

    if err != nil {
        logrus.WithError(err).Error("Error sending Slack message")
    }
}

func NotifyLoanSpecialist(cf *casefile.Casefile) {
    title := fmt.Sprintf("Casefile  <https://COMPANYWEBSITE/case/%s|%s>, assigned to <@%s> at %s", cf.ID, cf.Name, cf.AssignedLoanSpecialist, cf.CreatedAt.Format("2006-01-02 15:04 -0700 MST"))

    err := common.NewSlackNotifier("#test").Notify(common.SlackMessage{
        Attachments: []common.SlackAttachment{
            {
                Color:    "#008BF8",
                Fallback: title,
                Pretext:  title,
                Fields: []common.SlackField{
                    {
                        Title: cf.Name,
                        Value: fmt.Sprintf("https://COMPANYWEBSITE.io/case/%s", cf.ID),
                    },
                },
            },
        }})

    if err != nil {
        logrus.WithError(err).Error("Error sending Slack message")
    }
}

I'm not getting any errors in my terminal, but the slack notifications aren't sending. I'm not entirely sure where I'm going wrong, but any help will be much appreciated!