Error retrieving PostgreSQL DB information with Coturn

In order to understand how to use Postgresql-11 with Coturn,
https://github.com/coturn/coturn ,
I created a postgresql-11 dabatase using
/usr/local/share/turnserver/schema.sql :

CREATE TABLE turnusers_lt (
realm varchar(127) default '',
name varchar(512),
hmackey char(128),
PRIMARY KEY (realm,name)
);

CREATE TABLE turn_secret (
realm varchar(127) default '',
value varchar(256),
primary key (realm,value)
);

CREATE TABLE allowed_peer_ip (
realm varchar(127) default '',
ip_range varchar(256),
primary key (realm,ip_range)
);

CREATE TABLE denied_peer_ip (
realm varchar(127) default '',
ip_range varchar(256),
primary key (realm,ip_range)
);

CREATE TABLE turn_origin_to_realm (
origin varchar(127),
realm varchar(127),
primary key (origin)
);

CREATE TABLE turn_realm_option (
realm varchar(127) default '',
opt varchar(32),
value varchar(128),
primary key (realm,opt)
);

CREATE TABLE oauth_key (
kid varchar(128),
ikm_key varchar(256),
timestamp bigint default 0,
lifetime integer default 0,
as_rs_alg varchar(64) default '',
realm varchar(127),
primary key (kid)
);

But when trying to execute secure_relay_with_db_psql.sh :

(base) marco(at)marco-U36SG:~/turnserver-4.5.0.8/examples/scripts/longtermsecuredb$

./secure_relay_with_db_psql.sh
0: WARNING: Cannot find config file: turnserver.conf. Default and
command-line settings will be
used.
0: Listener address to use: 127.0.0.1
0: Listener address to use: ::1
0: Relay address to use: 127.0.0.1
0: Relay address to use: ::1
0: 3000000 bytes per second allowed per session
0: WARNING: Cannot find config file: turnserver.conf. Default and
command-line settings will
be used.
0: RFC 3489/5389/5766/5780/6062/6156 STUN/TURN Server
Version Coturn-4.5.0.8 'dan Eider'
0: Max number of open files/sockets allowed for this process: 4096
0: Due to the open files/sockets limitation,
max supported number of TURN Sessions possible is: 2000 (approximately)
0: ==== Show him the instruments, Practical Frost: ====

0: TLS supported
0: DTLS supported
0: DTLS 1.2 supported
0: TURN/STUN ALPN supported
0: Third-party authorization (oAuth) supported
0: GCM (AEAD) supported
0: OpenSSL compile-time version: OpenSSL 1.1.1 11 Sep 2018 (0x1010100f)
0: SQLite is not supported
0: Redis supported
0: PostgreSQL supported
0: MySQL supported
0: MongoDB is not supported
0:
0: Default Net Engine version: 3 (UDP thread per CPU core)

=====================================================

0: Domain name:
0: Default realm: north.gov
0: oAuth server name: blackdow.carleon.gov
0: WARNING: cannot find certificate file: turn_server_cert.pem (1)
0: WARNING: cannot start TLS and DTLS listeners because certificate
file is not set properly
0: WARNING: cannot find private key file: turn_server_pkey.pem (1)
0: WARNING: cannot start TLS and DTLS listeners because private key
file is not set properly
Cannot create pid file: /var/run/turnserver.pid: Permission denied
0: Cannot create pid file: /var/run/turnserver.pid
0: pid file created: /var/tmp/turnserver.pid
0: IO method (main listener thread): epoll (with changelist)
0: Wait for relay ports initialization...
0: relay 127.0.0.1 initialization...
0: relay 127.0.0.1 initialization done
0: relay ::1 initialization...
0: relay ::1 initialization done
0: Relay ports initialization done
0: IO method (general relay thread): epoll (with changelist)
0: turn server id=0 created
0: IPv4. SCTP listener opened on : 127.0.0.1:3478
0: IPv4. TCP listener opened on : 127.0.0.1:3478
0: IPv4. SCTP listener opened on : 127.0.0.1:3479
0: IPv4. TCP listener opened on : 127.0.0.1:3479
0: IPv6. SCTP listener opened on : ::1:3478
0: IPv6. TCP listener opened on : ::1:3478
0: IPv6. SCTP listener opened on : ::1:3479
0: IPv6. TCP listener opened on : ::1:3479
0: IO method (general relay thread): epoll (with changelist)
0: turn server id=1 created
0: IPv6. TCP listener opened on : ::1:3479
0: IPv6. UDP listener opened on: ::1:3479
0: Total General servers: 3
0: IO method (auth thread): epoll (with changelist)
0: IO method (auth thread): epoll (with changelist)
0: IO method (admin thread): epoll (with changelist)
0: IPv4. CLI listener opened on : 127.0.0.1:5766
0: PostgreSQL DB connection success: host=localhost dbname=coturn
user=turn password=turn
connect_timeout=30
0: ERROR: Error retrieving PostgreSQL DB information: ERROR:
permission denied for table
allowed_peer_ip

But these are the tables of coturndb :

coturn=# \dt
List of relations
Schema | Name | Type | Owner
--------+----------------------+-------+----------
public | admin_user | table | postgres
public | allowed_peer_ip | table | postgres
public | denied_peer_ip | table | postgres
public | oauth_key | table | postgres
public | turn_origin_to_realm | table | postgres
public | turn_realm_option | table | postgres
public | turn_secret | table | postgres
public | turnusers_lt | table | postgres
(8 rows)

coturn=# \d allowed_peer_ip
Table "public.allowed_peer_ip"
Column | Type | Collation | Nullable |
Default

----------+------------------------+-----------+----------+-----------------------
realm | character varying(127) | | not null |
''::character varying
ip_range | character varying(256) | | not null |
Indexes:
"allowed_peer_ip_pkey" PRIMARY KEY, btree (realm, ip_range)

coturn=# \d denied_peer_ip
Table "public.denied_peer_ip"
Column | Type | Collation | Nullable |
Default

----------+------------------------+-----------+----------+-----------------------
realm | character varying(127) | | not null |
''::character varying
ip_range | character varying(256) | | not null |
Indexes:
"denied_peer_ip_pkey" PRIMARY KEY, btree (realm, ip_range)

coturn=# \d turn_secret
Table "public.turn_secret"
Column | Type | Collation | Nullable |
Default

--------+------------------------+-----------+----------+-----------------------
realm | character varying(127) | | not null | ''::character
varying
value | character varying(256) | | not null |
Indexes:
"turn_secret_pkey" PRIMARY KEY, btree (realm, value)

Why it says "probably, the tables 'allowed_peer_ip' and/or 'denied_peer_ip'
have to be upgraded to include the realm column" ?
Why it says "permission denied" for table turn_secret and for table
allowed_peer_ip?
How to solve the problem?

Marco