diff --git a/doc/concept/auth/auth_parser.go b/doc/concept/auth/auth_parser.go
index 88771d6..2ac24ac 100644
--- a/doc/concept/auth/auth_parser.go
+++ b/doc/concept/auth/auth_parser.go
@@ -1,7 +1,6 @@
 package main
 
 import (
-	"fmt"
 	"strings"
 )
 
@@ -49,7 +48,7 @@ func (a *authParser) hostGroupOrSingle() parseFn {
 
 // hostIsGroup
 func (a *authParser) hostIsGroup() parseFn {
-	fmt.Printf("%v is a grp type\n", a.currentHost)
+	// fmt.Printf("%v is a grp type\n", a.currentHost)
 
 	hosts := a.authSchema.convToActualNodeSlice(a.currentHost)
 
@@ -78,14 +77,14 @@ func (a *authParser) hostIsGroup() parseFn {
 		}
 	}
 
-	fmt.Printf(" * ACLsToConvert=%+v\n", a.authSchema.schemaGenerated.ACLsToConvert)
+	// fmt.Printf(" * ACLsToConvert=%+v\n", a.authSchema.schemaGenerated.ACLsToConvert)
 	// Done with host. Return nil will make the main loop take the next host in the main for loop.
 	return nil
 }
 
 // hostIsNotGroup
 func (a *authParser) hostIsNotGroup() parseFn {
-	fmt.Printf("%v is a single node type\n", a.currentHost)
+	// fmt.Printf("%v is a single node type\n", a.currentHost)
 
 	host := a.currentHost
 
@@ -112,7 +111,7 @@ func (a *authParser) hostIsNotGroup() parseFn {
 		}
 	}
 
-	fmt.Printf(" * ACLsToConvert contains: %+v\n", a.authSchema.schemaGenerated.ACLsToConvert)
+	// fmt.Printf(" * ACLsToConvert contains: %+v\n", a.authSchema.schemaGenerated.ACLsToConvert)
 
 	// Done with host. Return nil will make the main loop take the next host in the main for loop.
 	return nil
diff --git a/doc/concept/auth/main.go b/doc/concept/auth/main.go
index b805747..447750d 100644
--- a/doc/concept/auth/main.go
+++ b/doc/concept/auth/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"crypto/sha256"
 	"encoding/json"
 	"fmt"
 	"log"
@@ -265,10 +266,25 @@ func (a *authSchema) generateJSONForAllNodes() error {
 				os.Exit(1)
 			}
 
+			hash := func() [32]byte {
+				sns := a.nodeMapToSlice(n)
+
+				js, err := json.Marshal(sns)
+				if err != nil {
+					err := fmt.Errorf("error: authSchema, json for hash:  %v", err)
+					log.Printf("%v\n", err)
+					return [32]byte{}
+				}
+
+				hash := sha256.Sum256(js)
+				return hash
+			}()
+
 			nd := NodeDataWithHash{
 				Data: b,
 				// TODO: Also add the hash here.
 				// Hash: [32]byte,
+				Hash: hash,
 			}
 
 			a.schemaGenerated.NodeMap[n] = nd
@@ -294,26 +310,26 @@ type sourceCommands struct {
 // defined for each fromNode are sorted.
 // This function is used when creating the hash of the nodeMap since we can not
 // guarantee the order of a hash map, but we can with a slice.
-func (a *authSchema) nodeMapToSlice(n node) sourceNodes {
+func (a *authSchema) nodeMapToSlice(host node) sourceNodes {
 	srcNodes := sourceNodes{
-		Node: n,
+		Node: host,
 	}
 
-	for sn, commandMap := range a.schemaMain.ACLMap[n] {
-		fnc := sourceCommands{
+	for sn, commandMap := range a.schemaGenerated.ACLsToConvert[host] {
+		srcC := sourceCommands{
 			Source: sn,
 		}
 
 		for cmd := range commandMap {
-			fnc.Commands = append(fnc.Commands, cmd)
+			srcC.Commands = append(srcC.Commands, cmd)
 		}
 
 		// sort.Strings(fnc.Commands)
-		sort.SliceStable(fnc.Commands, func(i, j int) bool {
-			return fnc.Commands[i] < fnc.Commands[j]
+		sort.SliceStable(srcC.Commands, func(i, j int) bool {
+			return srcC.Commands[i] < srcC.Commands[j]
 		})
 
-		srcNodes.SourceCommands = append(srcNodes.SourceCommands, fnc)
+		srcNodes.SourceCommands = append(srcNodes.SourceCommands, srcC)
 	}
 
 	sort.SliceStable(srcNodes.SourceCommands, func(i, j int) bool {
diff --git a/doc/concept/auth/main_test.go b/doc/concept/auth/main_test.go
index 0676e5a..77d1ed6 100644
--- a/doc/concept/auth/main_test.go
+++ b/doc/concept/auth/main_test.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"encoding/json"
 	"flag"
 	"fmt"
@@ -227,3 +228,23 @@ func TestSchemaMainACLMap(t *testing.T) {
 	}
 	// --- TESTS ---
 }
+
+func TestHash(t *testing.T) {
+	if !*logging {
+		log.SetOutput(io.Discard)
+	}
+
+	c := newCentralAuth()
+
+	c.authorization.authSchema.aclAdd("ship101", "admin", "HORSE")
+
+	c.authorization.authSchema.groupNodesAddNode("grp_nodes_ships", "ship101")
+	c.authorization.authSchema.aclAdd("grp_nodes_ships", "admin", "HEN")
+
+	hash := [32]uint8{0xe6, 0xe9, 0xf3, 0x25, 0x36, 0x48, 0x53, 0x4, 0xb4, 0x9a, 0xfd, 0x7f, 0x53, 0x85, 0x4c, 0x95, 0x62, 0xa9, 0x49, 0x23, 0x25, 0x1c, 0xee, 0xc5, 0x3b, 0xf5, 0xd5, 0x3, 0xf7, 0x9e, 0xb7, 0x3c}
+	value := c.authorization.authSchema.schemaGenerated.NodeMap["ship101"].Hash
+
+	if bytes.Equal(hash[:], value[:]) == false {
+		t.Fatalf(" \U0001F631  [FAILED]: hash mismatch")
+	}
+}