Unable to DB_USE_IAM_AUTH with aws RDS instance about collector HOT 4 CLOSED

apiVersion: v1
kind: Secret
metadata:
  name: {{ include "pganalyze-collector.fullname" . }}
type: Opaque
data:
  PGA_API_KEY: {{ .Values.pgAnalyze.apiKey | b64enc }}
  DB_HOST: {{ .Values.pgAnalyze.dbHost | b64enc }}
  DB_NAME: {{ .Values.pgAnalyze.dbName | b64enc }}
  DB_USERNAME: {{ .Values.pgAnalyze.dbUsername | b64enc }}
  {{- if .Values.pgAnalyze.dbUseIamAuth }}
  DB_USE_IAM_AUTH: {{ print "true" | b64enc }}
  {{- else }}
  DB_PASSWORD: {{ .Values.pgAnalyze.dbPassword | default "none" | b64enc }}
  {{- end }}

apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ include "pganalyze-collector.fullname" . }}
  labels:
    {{- include "pganalyze-collector.labels" . | nindent 4 }}
spec:
  replicas: 1
  selector:
    matchLabels:
      {{- include "pganalyze-collector.selectorLabels" . | nindent 6 }}
  template:
    metadata:
      {{- with .Values.podAnnotations }}
      annotations:
        {{- toYaml . | nindent 8 }}
      {{- end }}
      labels:
        {{- include "pganalyze-collector.labels" . | nindent 8 }}
    spec:
      {{- with .Values.imagePullSecrets }}
      imagePullSecrets:
        {{- toYaml . | nindent 8 }}
      {{- end }}
      serviceAccountName: {{ include "pganalyze-collector.serviceAccountName" . }}
      securityContext:
        {{- toYaml .Values.podSecurityContext | nindent 8 }}
      containers:
        - name: {{ .Chart.Name }}
          securityContext:
            {{- toYaml .Values.securityContext | nindent 12 }}
          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
          imagePullPolicy: {{ .Values.image.pullPolicy }}
          envFrom:
          - secretRef:
              name: {{ include "pganalyze-collector.fullname" . }}
              optional: false

          resources:
            {{- toYaml .Values.resources | nindent 12 }}
      {{- with .Values.nodeSelector }}
      nodeSelector:
        {{- toYaml . | nindent 8 }}
      {{- end }}
      {{- with .Values.affinity }}
      affinity:
        {{- toYaml . | nindent 8 }}
      {{- end }}
      {{- with .Values.tolerations }}
      tolerations:
        {{- toYaml . | nindent 8 }}
      {{- end }}

serviceAccount:
  annotations:
    eks.amazonaws.com/role-arn: arn:aws:iam::XXXXXXX:role/XXXXXXXX
  name: production-pganalyze