You can create the *path operations* for that module using `APIRouter`.

### Import `APIRouter`

You import it and create an "instance" the same way you would with the class `FastAPI`:

```Python hl_lines="1  3" title="app/routers/users.py"
{!../../docs_src/bigger_applications/app/routers/users.py!}
```

### *Path operations* with `APIRouter`

We annotate the function return type as `BaseUser`, but we are actually returning a `UserIn` instance.

The editor, mypy, and other tools won't complain about this because, in typing terms, `UserIn` is a subclass of `BaseUser`, which means it's a *valid* type when what is expected is anything that is a `BaseUser`.

    return CollectCollectors.toImmutableRangeSet();
  }

  /**
   * Returns an empty immutable range set.
   *
   * <p><b>Performance note:</b> the instance returned is a singleton.
   */
  @SuppressWarnings("unchecked")
  public static <C extends Comparable> ImmutableRangeSet<C> of() {
    return (ImmutableRangeSet<C>) EMPTY;
  }

  /**

  }

  @Retention(RetentionPolicy.RUNTIME)
  private @interface NotBlank {}

  /** Class for testing constructor, static method and instance method. */
  @SuppressWarnings("unused") // most are called by reflection
  private static class Prepender {

    private final String prefix;
    private final int times;

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versioning unchanged." fi # At this point, the bucket should exist, skip checking for existence # Set policy on the bucket echo "Setting policy of bucket '$BUCKET' to '$POLICY'." ${MC} policy set $POLICY myminio/$BUCKET } # Try connecting to Minio instance {{- if .Values.tls.enabled }} scheme=https {{- else }} scheme=http {{- end }} connectToMinio $scheme {{ if .Values.buckets }} # Create the buckets {{- range .Values.buckets }} createBucket {{ .name }} {{ .policy }} {{ .purge }} {{ .versioning }}...

versioning unchanged." fi # At this point, the bucket should exist, skip checking for existence # Set policy on the bucket echo "Setting policy of bucket '$BUCKET' to '$POLICY'." ${MC} policy set $POLICY myminio/$BUCKET } # Try connecting to Minio instance {{- if .Values.tls.enabled }} scheme=https {{- else }} scheme=http {{- end }} connectToMinio $scheme {{ if .Values.buckets }} # Create the buckets {{- range .Values.buckets }} createBucket {{ .name }} {{ .policy }} {{ .purge }} {{ .versioning }}...

versioning unchanged." fi # At this point, the bucket should exist, skip checking for existence # Set policy on the bucket echo "Setting policy of bucket '$BUCKET' to '$POLICY'." ${MC} policy set $POLICY myminio/$BUCKET } # Try connecting to Minio instance {{- if .Values.tls.enabled }} scheme=https {{- else }} scheme=http {{- end }} connectToMinio $scheme {{ if .Values.buckets }} # Create the buckets {{- range .Values.buckets }} createBucket {{ .name }} {{ .policy }} {{ .purge }} {{ .versioning }}...

versioning unchanged." fi # At this point, the bucket should exist, skip checking for existence # Set policy on the bucket echo "Setting policy of bucket '$BUCKET' to '$POLICY'." ${MC} policy set $POLICY myminio/$BUCKET } # Try connecting to MinIO instance {{- if .Values.tls.enabled }} scheme=https {{- else }} scheme=http {{- end }} connectToMinio $scheme {{ if .Values.buckets }} # Create the buckets {{- range .Values.buckets }} createBucket {{ .name }} {{ .policy }} {{ .purge }} {{ .versioning }}...

versioning unchanged." fi # At this point, the bucket should exist, skip checking for existence # Set policy on the bucket echo "Setting policy of bucket '$BUCKET' to '$POLICY'." ${MC} policy set $POLICY myminio/$BUCKET } # Try connecting to MinIO instance {{- if .Values.tls.enabled }} scheme=https {{- else }} scheme=http {{- end }} connectToMinio $scheme {{ if .Values.buckets }} # Create the buckets {{- range .Values.buckets }} createBucket {{ .name }} {{ .policy }} {{ .purge }} {{ .versioning }}...